Modbus Registers
Eaton Power Xpert Gateway PXGX PDP Card User’s Guide 164202122—Rev 1
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PDP Registers and Alarms
This section contains information for the PDP Registers (FC 04) and PDP Alarms (FC 02).
The register and alarm tables contain sample register lists and may not be the same as the registers in your
PDP.
PDP Registers (FC 04)
Figure 7 provides a partial list of data registers that are available from a PDP. Not all registers may be available
in your PDP.
To read the vendor name in the PDP, set the Modbus program to Unit ID 1 and register 1032:
IP: <IP address of PDP>
Unit ID: 1
Starting Register: 1032
Number of registers: 32
Function Code: 04
The PDP returns 32 registers containing up to 64 characters. There are two ASCII characters per register, so
the vendor name could be displayed as Eaton.
PDP Alarms (FC 02)
Table 8 provides a partial list of example PDP alarms. Your PDP may have different alarms. PDP alarms are not
registers, but are discrete inputs and are read using FC 01 or FC 02.
The PDP monitors the condition of several parameters and can activate an alarm status if a parameter is out of
range. For example, if the input frequency is too high or too low, the PDP can set the Input Frequency Fault
Alarm.
To read the Input Frequency Fault Alarm, set the Modbus program to Unit ID 1 and coil address 1008:
IP: <IP address of PDP>
Unit ID: 1
Starting Register: 1008
Number of Registers: 1
Function Code: 02
Table 7. PDP Sample Registers (FC 04)
Name
Register
Data Type
Bytes
Vendor Name
1032
STRING
64
Model Name
1064
STRING
64
Display Name
1096
STRING
64
Device Type
1128
STRING
64
Device ID
1192
STRING
64
Device Guide
1225
STRING
40
Serial Number
1276
STRING
64
Conn Style
1312
UINT
2
Device Comm Address
1313
STRING
64
Device Baud Rate
1345
UINT
4
Time Sync Period
1347
UINT
4
Data Update Period
1349
UINT
4
Device VAR Rating
1351
UINT
4
Device Volts In Rating
1357
UINT
4
Device Volts Out Rating
1359
UINT
4
