Rockwell-automation AADvance Controller Configuration Guide Instrukcja Użytkownika Pobierz pdf (Strona 231)

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Document: 553633

ICSTT-RM405f-EN-P

Issue 07

9-45

Modbus Slave Link Message Parameters

Each Modbus slave link message has a set of parameters as detailed in the table.

Table 33: Modbus Slave Link Message Parameters

Description

Value(s)

Default

Remarks

Command

Read Inputs;

Read Coils;

Write Coils;

Read Input Registers;

Read Holding Registers;

Write Holding Registers

Read Coils

Command type specifies

the direction of the

message

Slave

1 to 65,536

Range of values usable

depends on the slave

device

Master Mimic

Depends on command —

see table below

Various

Master

1 to 65,536

Count

1 to 2,000 for a Write Coils

message;

1 to 125 for a Write Holding

Registers message

Control

1 to 65,536,

or 0 to disable

The address of a control

0 = enabled

1 = disabled

Note: (†) The 'remarks' here summarize the values allowed for the contents of the

Table 34: Master Mimic Values for Modbus Slave Link Messages

Command

Master Mimic Value(s)

Default

Remarks

Read Inputs

Coils

Read Coils

Coils

Write Coils

Coils;

Inputs

Coils

Read Input Registers

Holding Registers

Holding

Registers

Read Holding

Registers

Holding Registers

Holding

Registers

1 2 ... 226 227 228 229 230 231 232 233 234 235 236 ... 285 286

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