Technical Data; Serial Communication Modules (Scm); Design, Spa/Iec - ABB REL 501-C1 2.5 Technical Reference Manual

1.6.4
1.7
1.7.1
Serial communication
Table 203: Setting parameters for the session timers
Parameter Range
SessionTmo 1-60
RetryTmo 100-10000
IdleAckCycle 1-30
BusyAckTmo 100-5000
ErrNackCycle 100-10000
Path in local HMI: Configuration/TerminalCom/LONCom
Table 204: LON commands
Command Command description
ServicePinMsg Command with confirmation. Transfers the node adress to the LON network tool.
LONDefault Command with confirmation. Resets the LON communication in the terminal.

Technical data

Table 205: LON - Serial Communication
Function
Protocol
Communication speed

Serial communication modules (SCM)

Design, SPA/IEC

The serial communication module for SPA/IEC is placed in a slot at the rear of the main pro-
cessing module. One of the following conection options is available for serial communication:
• two plastic fibre cables; (Rx, Tx) or
• two glass fibre cables; (Rx, Tx) or
• galvanic RS485
The type of connection is chosen when ordering the terminal.
Default Unit Parameter description
20 s Session timeout. Only to be changed
after recommendation from ABB.
2000 ms Retransmission timeout.Only to be
changed after recommendation from
ABB.
5 s Keep active ack.Only to be changed after
recommendation from ABB.
300 ms Wait before sending ack.Only to be
changed after recommendation from
ABB.
500 ms Cyclic sending of nack. Only to be
changed after recommendation from
ABB.
Value
LON
1.25 Mbit/s
Chapter 12
Data communication
195