Woodward GCP-31 Series - Modbus Connection via GW 4

Manual 37240C GCP-30 Series - Genset Control
Modbus Connection via GW 4
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Gateway GW4B/RS485+MOD
Gateway GW4B/RS485+MOD
P/N 5448
P/N 5448
-
-
901
901
Gateway GW4B/RS232+MOD
Gateway GW4B/RS232+MOD
P/N 5448
P/N 5448
-
-
895
895
Modbus
Modbus
RTU Slave based PLC
RTU Slave based PLC
visualization
visualization
and remote control possible
and remote control possible
Control
Control
terminals
terminals
X1
X1
-
-
X5
X5
CAN
CAN
Max 250 m
Max 250 m
RS
RS
-
-
485
485
RS
RS
-
-
232
232
up to 8
up to 8
GCPs
GCPs
can
can
be connected
be connected
to
to
the
the
same CAN Bus
same CAN Bus
up to 8
up to 8
GCPs
GCPs
can
can
be connected
be connected
to
to
the
the
same CAN Bus
same CAN Bus
Using GW 4/RS485 Modbus, a second unit of GW 4 can connected to communicate up to 14 GCP30.
Function
With this application, it is possible to communicate with the GCP(s) via the Modbus protocol. The GW 4 works
as RTU slave here.
While the RS-232 interface is used for the peer to peer connection, a field bus with several participants can also
be established with RS-485.
The bi-directional communication allows the following functions:
• Visualization of the process
• Remote control (start and stop, transferring the set values for real power and generator power factor)
Preconditions for this example
• GCP with CAN connection (X1/X5)
• GW4B/+MOD
• Automation device
Connection
The connection has to be taken from the GW 4 manual.
© Woodward Page 27/38