Gcp-30 Remote Control Data Table 4:0001; Ls 4 Mux Data Table 3:0001; Modbus Addresses For Gcp-30 Remote Control - Proconx GCP-MG User Manual

GCP-30 remote control data table 4:0001

The GCP-30 remote control data table is located in the so called Holding Register address
block, which sometimes is also identified with offset 4:0000. This block can be written
to using Modbus function code 16 Write multiple registers or function code 06 Write
single register.
If remote control is enabled, the three remote control words are sent cyclically to the
respective GCP-30. They are also stored in the GCP-MG's memory and can be read back
using Modbus function code 03 Read holding registers.
Remote control is disabled by default and Modbus exception code 03 Illegal value
is returned if a Modbus master tries to access remote control functions for a unit
configured as read-only. Remote control can be enabled on a per unit basis through
the GCP-30 settings page of the GCP-MG (see the section called "Configuring
GCP-30 and LS 4 Modbus access").
Block Modbus
address
4 0001
4 0002
4 0003
Table 6.7: Modbus addresses for GCP-30 remote control
If no response was obtained from the target GCP-30 unit, Modbus exception code
0B Gateway target device failed to respond is returned.

LS 4 MUX data table 3:0001

The LS 4 MUX data table contains all data values a LS 4 is transmitting cyclically on the
CAN bus. A LS 4 sends a value every 200 ms. Therefore it takes approximately 10 seconds
for a complete update of the data table with new values from the CAN bus. The data
table can be polled much faster by a Modbus master, however faster poll rates would
not offer higher update cycles.
The LS 4 MUX data table is located in the so called Input register address block, which
sometimes is also identified with offset 3:0000.
function code 04 Read input registers.
Only Modbus address 0001 can be accessed at all times. All other Modbus addresses
can only be accessed if the CAN communication between GCP-MG and LS 4 has been
3
Alternative access as Holding Registers is possible at 4:0101 since firmware 1.3
UMGCPMG-2201
GCP-30 GCP-30 manual designator
word no.
501 Generator real power set-point
502 Generator power factor set-point
503 Control word
Encoding
kW with control argument
cos phi x 100
Bit 1: 1 = Remote start
Bit 2: 1 = remote stop (high priority)
Bit 3: write always 0
Bit 4: write always 0
Bit 5: 1 = Alarm acknowledgment
Bit 6-16: internal use
3
The block is accessed using Modbus
Modbus data reference
39