28
6053/6055 Modbus Plus Communications Interface
690+
Communications Command
When sequencing is in the Remote Comms mode, the sequencing of the Inverter is controlled by
writing to the hidden parameter COMMS COMMAND (Tag 271). This parameter can only be
written to using a communications interface. The output parameter (Tag 273) COMMS
COMMAND of the COMMS CONTROL function block is provided as a diagnostic.
The COMMS COMMAND parameter is a 16-bit word based on standard fieldbus drive profiles.
Some bits are not implemented in this release (see “Supported” column of the table below).
Bit
Name
Description
Supported
Required
Value
0
Switch On
OFF1 Operational
√
1
(Not) Disable Voltage OFF2 Coast Stop
√
2
(Not) Quick Stop
OFF3 Fast Stop
√
3 Enable
Operation
√
4
Enable Ramp Output
=0 to set ramp output to
zero
1
5
Enable Ramp
=0 to hold ramp
1
6
Enable Ramp Input
=0 to set ramp input to
zero
1
7
Reset Fault
Reset on 0 to 1 transition
√
8
0
9
0
10
Remote
=1 to control remotely
1
11
0
12
0
13
0
14
0
15
0
