ABB REL 551-C1*2.5 - Technical Data; Serial Communication Modules (SCM); Design, SPA;IEC

134
Serial communication Chapter 9
Data communication
Table 153: Setting parameters for the session timers
Path in local HMI: Configuration/TerminalCom/LONCom
Table 154: LON commands
2.6.4 Technical data
Table 155: LON - Serial Communication
2.7 Serial communication modules (SCM)
2.7.1 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.
Parameter Range Default Unit Parameter description
SessionTmo 1-60 20 s Session timeout. Only to be changed
after recommendation from ABB.
RetryTmo 100-10000 2000 ms Retransmission timeout.Only to be
changed after recommendation from
ABB.
IdleAckCycle 1-30 5 s Keep active ack.Only to be changed after
recommendation from ABB.
BusyAckTmo 100-5000 300 ms Wait before sending ack.Only to be
changed after recommendation from
ABB.
ErrNackCycle 100-10000 500 ms Cyclic sending of nack. Only to be
changed after recommendation from
ABB.
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.
Function Value
Protocol LON
Communication speed 1.25 Mbit/s