diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-basic-config/modbus-basic-config.component.html b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-basic-config/modbus-basic-config.component.html
index 109053c8a7..17f5185bc6 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-basic-config/modbus-basic-config.component.html
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-basic-config/modbus-basic-config.component.html
@@ -19,10 +19,10 @@
   <mat-tab label="{{ 'gateway.general' | translate }}">
     <ng-container [ngTemplateOutlet]="generalTabContent"></ng-container>
   </mat-tab>
-  <mat-tab label="{{ 'gateway.master-connections' | translate }}">
+  <mat-tab label="{{ 'gateway.master-connections' | translate }}*">
     <tb-modbus-master-table formControlName="master"></tb-modbus-master-table>
   </mat-tab>
   <mat-tab label="{{ 'gateway.server-config' | translate }}">
-    <tb-modbus-server-config formControlName="slave"></tb-modbus-server-config>
+    <tb-modbus-slave-config formControlName="slave"></tb-modbus-slave-config>
   </mat-tab>
 </mat-tab-group>
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-data-keys-panel/modbus-data-keys-panel.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-data-keys-panel/modbus-data-keys-panel.component.ts
index ac448f703e..3f57658443 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-data-keys-panel/modbus-data-keys-panel.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-data-keys-panel/modbus-data-keys-panel.component.ts
@@ -67,6 +67,7 @@ export class ModbusDataKeysPanelComponent implements OnInit {
   readonly ModbusFunctionCodeTranslationsMap = ModbusFunctionCodeTranslationsMap;
   readonly defaultReadFunctionCodes = [3, 4];
   readonly defaultWriteFunctionCodes = [5, 6, 15, 16];
+  readonly stringAttrUpdatesWriteFunctionCodes = [6, 16];
 
   constructor(private fb: UntypedFormBuilder) {}
 
@@ -84,7 +85,7 @@ export class ModbusDataKeysPanelComponent implements OnInit {
     const dataKeyFormGroup = this.fb.group({
       tag: ['', [Validators.required, Validators.pattern(noLeadTrailSpacesRegex)]],
       value: [{value: '', disabled: !this.isMaster}, [Validators.required, Validators.pattern(noLeadTrailSpacesRegex)]],
-      type: [ModbusDataType.STRING, [Validators.required]],
+      type: [ModbusDataType.BYTES, [Validators.required]],
       address: [0, [Validators.required]],
       objectsCount: [1, [Validators.required]],
       functionCode: [this.getDefaultFunctionCodes()[0]],
@@ -146,6 +147,9 @@ export class ModbusDataKeysPanelComponent implements OnInit {
 
   private getFunctionCodes(dataType: ModbusDataType): number[] {
     if (this.keysType === ModbusValueKey.ATTRIBUTES_UPDATES) {
+      if (dataType === ModbusDataType.STRING) {
+        return this.stringAttrUpdatesWriteFunctionCodes;
+      }
       return this.defaultWriteFunctionCodes;
     }
     const functionCodes = [...this.defaultReadFunctionCodes];
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-security-config/modbus-security-config.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-security-config/modbus-security-config.component.ts
index bf926d3454..f056c9c92f 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-security-config/modbus-security-config.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-security-config/modbus-security-config.component.ts
@@ -61,6 +61,7 @@ import { takeUntil } from 'rxjs/operators';
 export class ModbusSecurityConfigComponent implements ControlValueAccessor, Validator, OnChanges, OnDestroy {
 
   @Input() isMaster = false;
+  @Input() disabled = false;
 
   securityConfigFormGroup: UntypedFormGroup;
 
@@ -90,6 +91,11 @@ export class ModbusSecurityConfigComponent implements ControlValueAccessor, Vali
       });
       this.observeValueChanges();
     }
+    if (this.disabled) {
+      this.securityConfigFormGroup.disable({emitEvent:false});
+    } else {
+      this.securityConfigFormGroup.enable({emitEvent:false});
+    }
   }
 
   ngOnDestroy(): void {
@@ -106,8 +112,8 @@ export class ModbusSecurityConfigComponent implements ControlValueAccessor, Vali
   }
 
   validate(): ValidationErrors | null {
-    return this.securityConfigFormGroup.valid ? null : {
-      serverConfigFormGroup: { valid: false }
+    return this.securityConfigFormGroup.valid || this.disabled ? null : {
+      securityConfigFormGroup: { valid: false }
     };
   }
 
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-config/modbus-slave-config.component.html b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-config/modbus-slave-config.component.html
index 13f31bdda5..4b0789fb4c 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-config/modbus-slave-config.component.html
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-config/modbus-slave-config.component.html
@@ -17,6 +17,13 @@
 -->
 <div class="tb-form-panel no-border no-padding padding-top" [formGroup]="slaveConfigFormGroup">
   <div class="tb-form-hint tb-primary-fill tb-flex center">{{ 'gateway.hints.modbus-server' | translate }}</div>
+  <div class="tb-form-row" fxLayoutAlign="space-between center">
+    <mat-slide-toggle class="mat-slide" formControlName="sendDataToThingsBoard">
+      <mat-label>
+        {{ 'gateway.enable' | translate }}
+      </mat-label>
+    </mat-slide-toggle>
+  </div>
   <div class="tb-flex row space-between align-center no-gap fill-width">
     <div class="fixed-title-width" translate>gateway.server-slave-config</div>
     <tb-toggle-select formControlName="type" appearance="fill">
@@ -168,13 +175,6 @@
       </mat-form-field>
     </div>
   </div>
-  <div class="tb-form-row" fxLayoutAlign="space-between center">
-    <mat-slide-toggle class="mat-slide" formControlName="sendDataToThingsBoard">
-      <mat-label>
-        {{ 'gateway.send-data-TB' | translate }}
-      </mat-label>
-    </mat-slide-toggle>
-  </div>
   <mat-expansion-panel>
     <mat-expansion-panel-header>
       <mat-panel-title>
@@ -203,7 +203,7 @@
             </mat-slide-toggle>
           </mat-panel-title>
         </mat-expansion-panel-header>
-        <tb-modbus-security-config formControlName="security" [isMaster]="true"></tb-modbus-security-config>
+        <tb-modbus-security-config formControlName="security" [disabled]="!slaveConfigFormGroup.get('sendDataToThingsBoard').value || !showSecurityControl.value" [isMaster]="true"></tb-modbus-security-config>
       </mat-expansion-panel>
       <ng-container [formGroup]="slaveConfigFormGroup.get('identity')">
         <div class="tb-form-row column-xs" fxLayoutAlign="space-between center">
@@ -251,6 +251,6 @@
   </mat-expansion-panel>
   <div class="tb-form-panel stroked">
     <div class="tb-form-panel-title" translate>gateway.values</div>
-    <tb-modbus-values formControlName="values"></tb-modbus-values>
+    <tb-modbus-values formControlName="values" [disabled]="!slaveConfigFormGroup.get('sendDataToThingsBoard').value"></tb-modbus-values>
   </div>
 </div>
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-config/modbus-slave-config.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-config/modbus-slave-config.component.ts
index 27de908e11..f1234ccfb1 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-config/modbus-slave-config.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-config/modbus-slave-config.component.ts
@@ -41,13 +41,13 @@ import {
 import { SharedModule } from '@shared/shared.module';
 import { CommonModule } from '@angular/common';
 import { Subject } from 'rxjs';
-import { takeUntil } from 'rxjs/operators';
+import { startWith, takeUntil } from 'rxjs/operators';
 import { GatewayPortTooltipPipe } from '@home/pipes/public-api';
 import { ModbusSecurityConfigComponent } from '../modbus-security-config/modbus-security-config.component';
 import { ModbusValuesComponent, } from '../modbus-values/modbus-values.component';
 
 @Component({
-  selector: 'tb-modbus-server-config',
+  selector: 'tb-modbus-slave-config',
   templateUrl: './modbus-slave-config.component.html',
   changeDetection: ChangeDetectionStrategy.OnPush,
   providers: [
@@ -138,6 +138,7 @@ export class ModbusSlaveConfigComponent implements ControlValueAccessor, Validat
     });
 
     this.observeTypeChange();
+    this.observeFormEnable();
   }
 
   ngOnDestroy(): void {
@@ -162,22 +163,46 @@ export class ModbusSlaveConfigComponent implements ControlValueAccessor, Validat
   writeValue(slaveConfig: ModbusSlave): void {
     this.showSecurityControl.patchValue(!!slaveConfig.security);
     this.updateSlaveConfig(slaveConfig);
-    this.updateControlsEnabling(slaveConfig.type);
+    this.updateFormEnableState(slaveConfig.sendDataToThingsBoard);
   }
 
   private observeTypeChange(): void {
     this.slaveConfigFormGroup.get('type').valueChanges.pipe(takeUntil(this.destroy$)).subscribe(type => {
-      this.updateControlsEnabling(type);
+      this.updateFormEnableState(this.slaveConfigFormGroup.get('sendDataToThingsBoard').value);
     });
   }
 
-  private updateControlsEnabling(type: ModbusProtocolType): void {
+  private observeFormEnable(): void {
+    this.slaveConfigFormGroup.get('sendDataToThingsBoard').valueChanges
+      .pipe(startWith(this.slaveConfigFormGroup.get('sendDataToThingsBoard').value), takeUntil(this.destroy$))
+      .subscribe(value => {
+      this.updateFormEnableState(value);
+    });
+  }
+
+  private updateFormEnableState(enabled: boolean): void {
+    if (enabled) {
+      this.slaveConfigFormGroup.enable({emitEvent: false});
+      this.showSecurityControl.enable({emitEvent: false});
+    } else {
+      this.slaveConfigFormGroup.disable({emitEvent: false});
+      this.showSecurityControl.disable({emitEvent: false});
+      this.slaveConfigFormGroup.get('sendDataToThingsBoard').enable({emitEvent: false});
+    }
+    this.updateEnablingByProtocol(this.slaveConfigFormGroup.get('type').value);
+  }
+
+  private updateEnablingByProtocol(type: ModbusProtocolType): void {
     if (type === ModbusProtocolType.Serial) {
-      this.serialSpecificControlKeys.forEach(key => this.slaveConfigFormGroup.get(key)?.enable({emitEvent: false}));
+      if (this.slaveConfigFormGroup.get('sendDataToThingsBoard').value) {
+        this.serialSpecificControlKeys.forEach(key => this.slaveConfigFormGroup.get(key)?.enable({emitEvent: false}));
+      }
       this.tcpUdpSpecificControlKeys.forEach(key => this.slaveConfigFormGroup.get(key)?.disable({emitEvent: false}));
     } else {
       this.serialSpecificControlKeys.forEach(key => this.slaveConfigFormGroup.get(key)?.disable({emitEvent: false}));
-      this.tcpUdpSpecificControlKeys.forEach(key => this.slaveConfigFormGroup.get(key)?.enable({emitEvent: false}));
+      if (this.slaveConfigFormGroup.get('sendDataToThingsBoard').value) {
+        this.tcpUdpSpecificControlKeys.forEach(key => this.slaveConfigFormGroup.get(key)?.enable({emitEvent: false}));
+      }
     }
   };
 
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-dialog/modbus-slave-dialog.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-dialog/modbus-slave-dialog.component.ts
index d989478e98..006ae7a482 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-dialog/modbus-slave-dialog.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-slave-dialog/modbus-slave-dialog.component.ts
@@ -145,6 +145,12 @@ export class ModbusSlaveDialogComponent extends DialogComponent<ModbusSlaveDialo
 
     this.slaveConfigFormGroup.patchValue({
       ...this.data.value,
+      port: this.data.value.type === ModbusProtocolType.Serial
+        ? null
+        : this.data.value.port,
+      serialPort: this.data.value.type === ModbusProtocolType.Serial
+        ? this.data.value.port
+        : '',
       values: {
         attributes: this.data.value.attributes ?? [],
         timeseries: this.data.value.timeseries ?? [],
@@ -172,8 +178,8 @@ export class ModbusSlaveDialogComponent extends DialogComponent<ModbusSlaveDialo
       delete slaveResult.values;
       if (slaveResult.type === ModbusProtocolType.Serial) {
         slaveResult.port = slaveResult.serialPort;
-        delete slaveResult.serialPort;
       }
+      delete slaveResult.serialPort;
       this.dialogRef.close(slaveResult);
     }
   }
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-values/modbus-values.component.html b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-values/modbus-values.component.html
index 7db9a54681..5e0b4d7649 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-values/modbus-values.component.html
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-values/modbus-values.component.html
@@ -47,6 +47,7 @@
       <button type="button"
               mat-icon-button
               color="primary"
+              [disabled]="disabled"
               #attributesButton
               (click)="manageKeys($event, attributesButton, ModbusValueKey.ATTRIBUTES, register)">
         <tb-icon matButtonIcon>edit</tb-icon>
@@ -67,6 +68,7 @@
       <button type="button"
               mat-icon-button
               color="primary"
+              [disabled]="disabled"
               #telemetryButton
               (click)="manageKeys($event, telemetryButton, ModbusValueKey.TIMESERIES, register)">
         <tb-icon matButtonIcon>edit</tb-icon>
@@ -86,6 +88,7 @@
       </mat-chip-listbox>
       <button type="button"
               mat-icon-button
+              [disabled]="disabled"
               color="primary"
               #attributesUpdatesButton
               (click)="manageKeys($event, attributesUpdatesButton, ModbusValueKey.ATTRIBUTES_UPDATES, register)">
@@ -107,6 +110,7 @@
       <button type="button"
               mat-icon-button
               color="primary"
+              [disabled]="disabled"
               #rpcRequestsButton
               (click)="manageKeys($event, rpcRequestsButton, ModbusValueKey.RPC_REQUESTS, register)">
         <tb-icon matButtonIcon>edit</tb-icon>
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-values/modbus-values.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-values/modbus-values.component.ts
index 57acf4a21c..f1df094e8b 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-values/modbus-values.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-values/modbus-values.component.ts
@@ -43,6 +43,8 @@ import {
   ModbusRegisterType,
   ModbusRegisterValues,
   ModbusValueKey,
+  ModbusValues,
+  ModbusValuesState,
 } from '@home/components/widget/lib/gateway/gateway-widget.models';
 import { SharedModule } from '@shared/shared.module';
 import { CommonModule } from '@angular/common';
@@ -87,6 +89,7 @@ import { ModbusDataKeysPanelComponent } from '../modbus-data-keys-panel/modbus-d
 export class ModbusValuesComponent implements ControlValueAccessor, Validator, OnChanges, OnDestroy {
 
   @Input() singleMode = false;
+  @Input() disabled = false;
 
   modbusRegisterTypes: ModbusRegisterType[] = Object.values(ModbusRegisterType);
   modbusValueKeys = Object.values(ModbusValueKey);
@@ -135,8 +138,19 @@ export class ModbusValuesComponent implements ControlValueAccessor, Validator, O
     this.onTouched = fn;
   }
 
-  writeValue(values: ModbusRegisterValues): void {
-    this.valuesFormGroup.patchValue(values, {emitEvent: false});
+  writeValue(values: ModbusValuesState): void {
+    if (this.singleMode) {
+      this.valuesFormGroup.setValue(this.getSingleRegisterState(values as ModbusValues), {emitEvent: false});
+    } else {
+      const registers = values as ModbusRegisterValues;
+      this.valuesFormGroup.setValue({
+        holding_registers: this.getSingleRegisterState(registers.holding_registers),
+        coils_initializer: this.getSingleRegisterState(registers.coils_initializer),
+        input_registers: this.getSingleRegisterState(registers.input_registers),
+        discrete_inputs: this.getSingleRegisterState(registers.discrete_inputs),
+      }, {emitEvent: false});
+    }
+    this.cdr.markForCheck();
   }
 
   validate(): ValidationErrors | null {
@@ -201,4 +215,13 @@ export class ModbusValuesComponent implements ControlValueAccessor, Validator, O
         this.onTouched();
       });
   }
+
+  private getSingleRegisterState(values: ModbusValues): ModbusValues {
+    return {
+      attributes: values?.attributes ?? [],
+      timeseries: values?.timeseries ?? [],
+      attributeUpdates: values?.attributeUpdates ?? [],
+      rpc: values?.rpc ?? [],
+    };
+  }
 }
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/gateway-widget.models.ts b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/gateway-widget.models.ts
index 394f6c29d0..1204ba087a 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/gateway-widget.models.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/gateway-widget.models.ts
@@ -973,12 +973,21 @@ export interface ModbusSlave {
   sendDataToThingsBoard: boolean;
   byteOrder: ModbusOrderType;
   identity: ModbusIdentity;
-  values: ModbusRegisterValues;
+  values: ModbusValuesState;
   port: string | number;
   security: ModbusSecurity;
 }
 
+export type ModbusValuesState = ModbusRegisterValues | ModbusValues;
+
 export interface ModbusRegisterValues {
+  holding_registers: ModbusValues;
+  coils_initializer: ModbusValues;
+  input_registers: ModbusValues;
+  discrete_inputs: ModbusValues;
+}
+
+export interface ModbusValues {
   attributes: ModbusValue[];
   timeseries: ModbusValue[];
   attributeUpdates: ModbusValue[];
diff --git a/ui-ngx/src/assets/locale/locale.constant-en_US.json b/ui-ngx/src/assets/locale/locale.constant-en_US.json
index 067574b7df..15583665b7 100644
--- a/ui-ngx/src/assets/locale/locale.constant-en_US.json
+++ b/ui-ngx/src/assets/locale/locale.constant-en_US.json
@@ -2901,6 +2901,7 @@
         "device-profile-required": "Device profile required",
         "download-tip": "Download configuration file",
         "drop-file": "Drop file here or",
+        "enable": "Enable",
         "enable-subscription": "Enable subscription",
         "extension": "Extension",
         "extension-hint": "Put your converter classname in the field. Custom converter with such class should be in extension/mqtt folder.",