ABB REF 54 Series Technical Reference Manual, General

1MRS750527-MUM
REF 54_
73
Feeder Terminal
Technical Reference Manual, General
1) When using communication speeds below 1200 bits/s, be sure to set the values for parameters to
values above the time it takes for one character to be sent. Note that if the values are not correctly
set, the sent messages will be lost.
2) If parameter F503V024, Unsolicited reporting mode, is set to “0”, REF 54_ responds to an Enable
Unsolicited Reporting request with the Internal indication IIN2.0 (Function Code Not Supported) bit
set.
3) See the manual DNP 3.0 Remote Communication Protocol for REF 54_ and RET 54_.
Modbus
The Modbus protocol has two serial transmission modes: ASCII and RTU. These
modes define the bit contents of the message fields transmitted in the network.
Adjustable Modbus serial communication parameters are shown in the table below.
Protocol mapping
diagnostic parameter
Number of entries referring to invalid
objects from existing block (NOB)
Protocol mapping
diagnostic parameter
Number of entries translated into
protocol mapping
Protocol mapping
diagnostic parameter
Protocol mapping name
Collision counter 0...65535 0
Collision detection
3)
Frame error counter 0...65535 0
Parity error counter 0...65535 0
Overrun error counter 0...65535 0
Parameter Value Default Explanation
Unit address 1...247 1 Address of the REF 54_ in the Modbus
network. Must be same as configured
in the master station.
CRC order 0/1
[0=LO/HI, 1=HI/LO]
0 The order of CRC bytes in protocol
frame. Not used in ASCII mode
Protocol mode 0/1
[0=ASCII, 1=RTU]
1 Chooses whether the REF 54_ uses
ASCII or RTU mode.
Password ASCII codes 4 space
characters
Password for control operations
Protocol mapping
diagnostic parameter
0 Total entries counter
Protocol mapping
diagnostic parameter
0 Number of entries not in use
Protocol mapping
diagnostic parameter
0 Number of entries with invalid,
uncorrectable contents (INV)
Protocol mapping
diagnostic parameter
0 Number of entries with corrected
contents (COR)
Protocol mapping
diagnostic parameter
0 Number of entries referring to
nonexistent block (NBL)
Protocol mapping
diagnostic parameter
of NOB entries
0 Number of entries referring to invalid
objects from existing block (NOB)
Protocol mapping
diagnostic parameter
0 Number of entries translated to
operational protocol mapping
Baud rate
0...6
1) 2)
[0=300
1=600
2=1200
3=2400
4=4800
5=9600
6=19200]
6
Parameter Value Default Explanation

ABB REF 54 Series Specifications

General

Brand	ABB
Model	REF 54 Series
Category	Touch terminals
Language	English