ProSoft Technology MVI56-AFC - Manual (Page 297)

MVI56-AFC ♦ ControlLogix Platform Reference
Liquid and Gas Flow Computer User Manual
ProSoft Technology, Inc. Page 297 of 316
February 25, 2011
Bit Parameter Value
bit 7 Modbus mode 0: RTU mode
1: ASCII mode
bit 8 Modbus orientation 0: slave
1: master (permitted only for last port)
bit 9 Primary slave
accessibility (not
meaningful for master
port)
0: primary slave accessible through this port
1: primary slave not accessible (not permitted for Port 1)
bit 10 Swap Modbus bytes
bit 11 Swap Modbus words
bit 12 Disable pass-thru (not meaningful for master port)
bits 13 to 15 [reserved]
A change in configuration takes effect after transmission of the response to the
Modbus command that causes the change; the response is sent using the old
configuration, but subsequent Modbus commands to the reconfigured port must
use the new one. Writing a baud code of 0 means that the current configuration
is not to be changed, and all other items are ignored. Default values are 6 for the
bitmap (9600,N,8,1,RTU,slave,primary,noswap,passthru) and 0 for the timeout
and both delays. The message transmission procedure is:

Raise RTS.

If TmoC is zero ignore CTS, else wait up to TmoC clock ticks for CTS.

Delay for Dly1 clock ticks.

Transmit message.

Delay for Dly0 clock ticks.

Drop RTS.