User Manual, Firmware rev. 3.0 or LATER Owner's manual

Publication 1404-UM001F-EN-P - November 2009 65
Communication Chapter 4
Optional RS-232 Communication
Powermonitor 3000 units with a catalog number ending in -232 are
equipped with an optional RS-232 serial port in addition to the native
port. These units are set up at the factory to auto-sense the protocol
used by the initiator or master device on the network. The
configuration parameters are the same as the native RS-485 port with
the following exception:
• Flow Control: Enables or disables hardware handshaking.
Default disabled
Native Communication Configuration Summary
Parameter Description Range Default User
Setting
Protocol DF1
Full-duplex
DF1
Half-duplex
Slave
Modbus RTU
Slave
Auto-Sense
Auto-Sense
Delay Time between receiving
a request and
transmitting a response
0…75 ms 10 ms
Communication
Rate
RS-485 port
communication bit rate
1.2 Kbps
2.4 Kbps
4.8 Kbps
9.6 Kbps
19.2 Kbps
38.4 Kbps
57.6 Kbps
9600 baud
RS-485 Address Uniquely identifies the
Powermonitor device on
a multi-drop network
1…247 Unit ID number
Data Format Data bits / Stop bits /
Parity
8 / 1/ none
8 / 1/ even
8 / 1/ odd
8 / 1 / none
Inter-Character
Timeout
Mimimum delay
between characters that
indicates end of Modbus
message packet
0…6553 ms 0 (= 3.5
character times)
Error Checking BCC, CRC CRC