ABB RET 543 - Page 74

74
1MRS755225
Transformer Terminal
Technical Reference Manual, General
RET 54_
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 corr
ectly
set, the sent messa
ges will be lost.
2) If p
arameter F503V024, Unsolicited reporting mode, is set to “0”, RET 54_ responds to an
Enable
Unsolicite
d Reporting request with the Internal indication IIN2.0 (Function Code Not Supporte
d) bit
set.
3) F
or more information, refer to DNP 3.0 Communication Protocol Technical Description (see “R
elated
document
s” on page 9)
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.
Parity 0...2
[0=None;
1=Odd;
2=Even]
0
Silent interval 10...65535 [ms] 20
Collision detection
3)
Time slot width 10...65535 [ms] 10
Collision detection
3)
Number of time slots 1...255 8
Collision detection
3))
Collision detection
enabled
0...1
[0=Disabled;
1=Enabled]
0
Collision detection
3)
Protocol mapping
diagnostic parameter
DNP protocol mapping file
Protocol mapping
diagnostic parameter
Total entries counter
Protocol mapping
diagnostic parameter
Number of entries not in use
Protocol mapping
diagnostic parameter
Number of entries with invalid,
uncorrectable contents (INV)
Protocol mapping
diagnostic parameter
Number of entries with corrected
contents (COR)
Protocol mapping
diagnostic parameter
Number of entries referring to
nonexistent block (NBL)
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 name Values Default Explanation
Unit address 1...247 1 Address of the RET 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 RET 54_ uses
ASCII or RTU mode.
Password ASCII codes 4 space
characters
Password for control operations
Protocol mapping
diagnostic parameter
0 Total entries counter