100/180 mm PAPERLESS GRAPHIC RECORDER: USER GUIDE
User Guide
Page 153
HA028910
Issue 13 Sep 16
4.3.15 CONFIGURATION PARAMETERS (Cont.)
MESSAGING RULES
1 If no start-of-message characters are confi gured, but a timeout value other than 0 has been entered,
the new message starts after the timeout period has elapsed.
2 If no end-of-message characters are confi gured, but a timeout value other than 0 has been entered,
the new message ends after the timeout period has elapsed.
3 If start-of-message characters are confi gured, and a timeout value other than 0 has been entered, all
characters prior to the Start-of-message characters are ignored.
4 If start-of-message characters are confi gured but neither end characters nor timeout have been con-
fi gured, then this is an invalid confi guration.
Should this confi guration be a requirement, if the same characters are entered as end-of-message
characters instead, then each message will be sent to the groups when the next message is received.
5 If no start or end-of-message characters are entered and no timeout value is entered, all received
characters are discarded
6 If a received message is deemed to be corrupt, it is discarded and the software will await a further
message.
7 Start and End-of-message characters are removed before the messages are sent to the groups.
MODBUS ADDRESS
When acting as a slave, the recorder will respond both to the address set in Instrument Confi guration
(
section 4.3.1
) and to address 255 (used by some network scanning software).
