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24
Communications Status
The COMMS STATUS parameter (PREF 95.08, Modbus Holding Register 7097) in the
COMMS CONTROL function block monitors the sequencing of the Drive. It is a 16-bit word
based on standard fieldbus drive profiles. Some bits are not implemented in the initial release
and are set to 0 (see "Supported" column of the table below).
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Ready To Switch On
Same as the SWITCH ON ENABLE output parameter of the SEQUENCING LOGIC function
block.
Switched On
Same as the SWITCHED ON output parameter of the SEQUENCING LOGIC function block.
Operation Enabled
Same as the RUNNING output parameter of the SEQUENCING LOGIC function block.
Fault
Same as the TRIPPED output parameter of the SEQUENCING LOGIC function block.
(Not) Voltage Disabled
If in Remote Comms mode, this is the same as Bit 1 of the COMMS COMMAND parameter.
Otherwise it is the same as the NOT COAST STOP input parameter of the SEQUENCING
LOGIC function block.
(Not) Quick Stop
If in Remote Comms mode, this is the same as Bit 2 of the COMMS COMMAND parameter.
Otherwise it is the same as the NOT FAST STOP input parameter of the SEQUENCING
LOGIC function block.
Switch On Disable
Set (=1) only when in START DISABLED state.
Remote
This bit is set (= 1) if the Drive is in Remote mode AND the parameter REMOTE COMMS SEL
of the COMMS CONTROL function block is Set (= 1).
Setpoint Reached
This bit is set (=1) if the Reference Ramp is not ramping.
Internal Limit Active
This bit is set (=1) if, while in vector control mode, the speed limit has reached the torque limit;
or, while in Volts/Hz mode, the open loop current limit is active.
Name
Ready To Switch On
Switched On
Operation Enabled
Fault
(Not) Voltage Disabled
(Not) Quick Stop
Switch On Disable
Warning
SP / PV in Range
Remote
Setpoint Reached
Internal Limit Active
Description
Ready for operation (refer control bit 0)
(refer control bit 3)
Tripped
OFF 2 Command pending
OFF 3 Command pending
Switch On Inhibited
= 1 if Drive will accept Command Word
= 1 if not ramping
= 1 if current limit active or speed loop is
in torque limit
8903/RS RS485 Communications Interface
Supported
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