KROHNE MFC 010 C Converter - Manual (Page 29)

MFC010 Interface Manual 27
6.5 05 (05
16
): Force Single Coil
This function permits the user to set the state of a single Discrete Output “Coil” register. (See Section 7.2
on page 39 for det ails of t he i ndividual r egisters). I n t he MFC010 implementation, these registers are
used t o i nitiate c ommands and functions. S etting t he O utput s tate i nitiates t he f unction, at tempting t o
clear t he O utput s tate w ill r esult i n a dat a er ror. The format of the Master request telegram for this
function should be as follows.
Request
Character
Field For Example
1 Slave Address 01
16
Request to Slave ID 1
2 Function 05
16
“Force Single Coil”
3 Coil Address Hi 03
16
Coil Address = 1001
4 Coil Address Lo E8
16
5 Force Data Hi FF
16
Set Coil “Active”
6 Force Data Lo 00
16
7 CRC Lo 0C
16
CRC Checksum
8 CRC Hi 4A
16
The MFC010 will respond to such a request with a telegram formatted as follows.
Response
Character
Field For Example
1 Slave Address 01
16
Response from Slave ID 1
2 Function 05
16
“Force Single Coil”
3 Coil Address Hi 03
16
Coil Address = 1001
4 Coil Address Lo E8
16
5 Force Data Hi FF
16
Set Coil “Active”
6 Force Data Lo 00
16
7 CRC Lo 0C
16
CRC Checksum
8 CRC Hi 4A
16
The MFC010 (slave) response telegram should be an exact duplicate of the master request telegram.