Rockwell-automation AADvance Controller Configuration Guide Instrukcja Użytkownika Pobierz pdf (Strona 226)

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9-40

Document: 553633

ICSTT-RM405f-EN-P

Issue 07

Configuration Guide (AADvance Controller)

Read Holding Registers

Function: read

Function Code = 3

Address Offset: HOLDING_REG_ADDR

Data Type: analogue

Fixed Length: 8

Varbyte length: 0

Purpose: Reads the contents of a contiguous block of holding registers in a remote

device.

Read Input Registers

Function: read

Function Code = 4

Address Offset: INPUT_REG_ADDR

Data Type: boolean

Fixed Length: 8

Varbyte length: 0

Purpose: Reads from 1 to 125 contiguous input registers in a remote device.

Write Single Coil

Function: write

Function Code = 5

Address Offset: COIL_STATUS_ADDR

Data Type: boolean

Fixed Length: 8

Varbyte length: 0

Purpose: Writes a single output to either ON or OFF in a remote device.

Write Single Register

Function: write

Function Code = 6

Address Offset: HOLDING_REG_ADDR

Data Type: analogue

Fixed Length: 8

Varbyte length: 0

Purpose: Writes a single holding register in a remote device.

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Rockwell-automation AADvance Controller Configuration Guide Instrukcja Użytkownika Strona 226