ABB REF 54 Series Technical Reference Manual, General

70
1MRS750527-MUM
Feeder Terminal
Technical Reference Manual, General
REF 54_
5.1.13.7. Communication parameters
SPA
The SPA bus protocol uses an asynchronous serial communication protocol (1 start
bit, 7 data bits + even parity, 1 stop bit) with adjustable data transfer rate; Baud rate
(default 9.6 kbps) and SPA address (slave number).
The SPA communication parameters are the same for communication via the front
optical RS-232 and the rear RS-485 connectors. The SPA address is the same also
for transparent SPA communication on the LON.
1) This functionality is valid only in the feeder terminal revisions of releases prior to Release 2.0. The
parameter is accessible only via serial communication. SPA communication on the front connector
inhibits the rear X3.3 SPA communication and the transparent SPA communication on the LON
protocol and remains inhibited for one minute after the SPA communication has stopped. It is
possible to release this blocking situation by writing the value 1 to the V202 variable.
LON
Adjustable LON serial communication parameters are Subnet number, Node
number and Bit rate.
The bit rate 1250 kbps on the LON protocol is used for the optical serial
communication network using the RER 103 module connected to the X3.3
connector.
IEC_103
Adjustable IEC_103 serial communication parameters are shown in the table below.
1) Refer to Table 9.5.-3 on page 124
The IEC_103 protocol is used for the optical serial communication network using
the RER 123 module connected to the X3.2 connector.
The unit address is used for identifying the device from the protocol point of view.
For more information, see Table 5.2.1-11 on page 92.
Parameter Value Default value Explanation
SPA address 0...999 1 Slave number for communication
Baud rate 4800; 9600; 19200 bps 9600 Data transfer rate for communication
Rear connection Connect
Activate rear SPA connection
1)
Parameter Value Default Explanation
Subnet number 1...255 1 LON subnet number
Node number 1...127 1 LON node number
Bit rate 78.1; 1250 kbps 1250 LON communication speed
Parameter Value Default Explanation
Unit address 1...254 1 IEC_103 station address
Baud rate 9600, 19200 9600 Communication speed
Function type 0...255 160 Unit function type
Scale factor 1.2 or 2.4 1.2 Analog value scale factor
Frame type 0...17
1)
0 Measurement frame type
RTD data frame
0 or 1
1)
0 If RTD data frame is on, it is sent to
class 2 data poll every second.

ABB REF 54 Series Specifications

General

Brand	ABB
Model	REF 54 Series
Category	Touch terminals
Language	English