Specifications

Bulletin No. VVDED397044US R12/00 Section 2—Modbus Plus Overview

December 2000 Control Registers

Protection of Adjustment and Configuration Access

A configuration semaphore has not been provided in order to ensure

read-only access to the configuration and adjustment parameters. Any

processing unit can access the configuration and adjustment parameters.

Access Protection by Forced Local

Writing of Command registers is blocked during forced local.

CONTROL REGISTERS (READ AND WRITE)

Control registers cannot be modified if another device on the MODBUS

PLUS Network has reserved this drive controller’s command semaphore,

or is peer copping the desired control register.