ACS Marvair CommStat 4, Installation And Operation Manual

Page: 14 / 18

CommStat
™
4
Modbus Adapter
Installation & Operation
Page 14
Register Source Value Description
40131 Remote Setting #31 Stage 7 differential
40132 Remote Setting #32 Stage 8 differential
40133 Remote Setting #33 Stage 9 differential
40134 Remote Setting #34 Stage 10 differential
40135 Remote Setting #35 Stage 11 differential
40136 Remote Setting #36 Stage 12 differential
40137 Remote Setting #37 Total Number of Units
40138 Remote Setting #38 Stage 2 differential in econ cooling mode
40139 Remote Controller On/Off Whether the controller should be on or off
40140 Remote Lead unit Which unit should be the lead unit
40141 Remote Password #1 First byte of the password
40142 Remote Password #2 Second bytes of the password
40143 Remote Function code The purpose of this communication signal
Table 2: CommStat
™
4 Modbus Write Registers
The process to update parameters in the
CommStat 4 unit is controlled through the use of register 40101. The sequence of operation and the
corresponding values for register 40101 are as follows:
Register 40101 Value Description
0 Normal operation, current parameter values are copied to “new parameter values” registers each cycle
Remote Client Writes 1
Adapter stops copying current parameter values to “new parameter values” registers each cycle allowing
the remote client to make updates to selected parameters
Remote Client Writes 2 Instructs adapter to write “new parameter values” to CommStat
TM
4 at the next available cycle
Adapter Writes 3 Adapter indicates confirmation of write request and waiting for write cycle completion
Adapter Writes 0 Adapter indicates completion of write to CommStat
TM
4