Force single coil (function 05), Pre-set single register (function 06), Loopback diagnostic test (function 08) – Pyromation Series 610 1_16 DIN User Manual

Page 131

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Force Single Coil (Function 05)

Writes a single binary value to the Specified Instrument Bit address.

Table 35. Force Single Coil (Modbus Function 05)

QUERY

Function

Address of Bit

State to write

05 HI LO

FF/00

00

RESPONSE

Function

Address of Bit

State written

05 HI LO

FF/00

00


The address specifies the address of the bit to be written to. The State to write is FF when
the bit is to be SET and 00 if the bit is to be RESET.

Note:

The Response normally returns the same data as the Query.

Pre-Set Single Register (Function 06)

Writes two bytes to a specified word address.

Table 36. Pre-Set Single Register (Modbus Function 06)

QUERY

Function

Address of Word

Value to write

06 HI LO HI LO

RESPONSE

Function

Address of Word

Value written

06 HI LO HI LO

Note:

The Response normally returns the same data as the Query.

Loopback Diagnostic Test (Function 08)

Table 37. Loopback Diagnostic Test (Modbus Function 08)

QUERY

Function Diagnostic

Code

Value

08 HI

=00

LO=00 HI LO

RESPONSE

Function Sub-function

Value

08 HI=00

LO=00 HI LO

Note:

The Response normally returns the same data as the Query.


Page 126

Modbus Communications

59305, Issue 6 – March 2006

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