Force Multiple Coils (Function Code 15) - ProSoft MVI56E-MNETCR User Manual

Reference
User Manual
Request
Field Name
Function
Sub-function Hi
Sub-function Lo
Data Hi
Data Lo
The data fields in responses to other kinds of queries could contain error counts
or other data requested by the sub-function code.

5.5.9 Force Multiple Coils (Function Code 15)

Query
This message forces each coil in a consecutive block of coils to a desired ON or
OFF state. Any coil that exists within the controller can be forced to either state
(ON or OFF). However, because the controller is actively scanning, unless the
coils are disabled, the controller can also alter the state of the coil. Coils are
numbered from zero (coil 00001 = zero, coil 00002 = one, and so on). The
desired status of each coil is packed in the data field, one bit for each coil (1=
ON, 0= OFF). The use of server address 0 (Broadcast Mode) will force all
attached servers to modify the desired coils.
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Modbus TCP/IP Multi-Client Enhanced Communications Module for Remote Chassis
(Hex)
08
00
00
A5
37
MVI56E-MNETCR ♦ ControlLogix Platform
Response
Field Name (Hex)
Function 08
Sub-function Hi 00
Sub-function Lo 00
Data Hi A5
Data Lo 27
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