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Chapter
5
Operating Instructions
Flexi Soft Gateways
40
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8012664/XB29/2013-06-11
Subject to change without notice
Ethernet gateways
General telegram structure
The request/response message (e.g. telegram) is structured as shown below:
0
1
…
…
…
…
…
…
…
…
…
…
…
…
n
Command
Parameter(s)
(content depends on type of command)
Data
Parameter
Length
Description
Command
WORD
0h
= Undefined (no command)
Polling mode specific
00F1h
= Input data set(s) request message
001Fh
= Input data set(s) response message
Auto-update specific
00E1h
= Auto update control
001Eh
= Auto update control response
002Eh
= Auto update input data set(s) message
Digital outputs read/write
00F2h
= Write output data set settings
002Fh
= Response to write output data set settings
Parameter(s) Length
determined
by command
As defined in specific command
Data Length
determined
by command
As defined in specific command
Error response to invalid messages
The gateway will set the most significant bit of the command word in the event that an
invalid or improperly formatted message is received.
Parameter
Length
Description
Command
WORD
Bit 15 of received command will be set
(i.e. command of 00F2h would become 80F2h)
Following
data
Length
determined
by command
Unchanged. Returned as it was received
Tab. 19: Telegram structure
Tab. 20: Error response
message