Filter
Top Products
90
Allocated DM Area Words Section 3-3
03, 11 Slave
Remote I/O
Communica-
tions Error
Flag
ON Unit Indicates that an error has occurred in remote I/O communications
with the Slave.
This bit turns ON if a timeout occurs in at least one connection with
multiple connections set.
This error occurs with the scan list enabled or disabled.
OFF Unit Indicates that a remote I/O communications error has not occurred
or turns OFF when a remote I/O communications error is cleared.
04, 12 Reserved by
system
--- --- ---
05, 13 Master COS
Send Fail-
ure Flag
ON Unit Indicates that COS sent to a slave destination failed.
Use the Master COS Send Switch (n+2/n+3/n+4/n+5 words) to send
COS.
The following may be cause failure of COS signal transmission.
• Remote I/O communications stopped
• A COS connection was not established
• Bus OFF has occurred.
• A network power error has occurred.
• A send timeout has occurred.
Once this bit turns ON, it will remain ON until the operation is suc-
cessfully completed.
OFF Unit Indicates that the error has not occurred. The bit turns OFF when
COS is successfully sent.
06, 14 Scan List
Registration
Flag
ON Unit Indicates that the slave is registered in the scan list.
OFF Unit The Unit is operating with the scan list disabled or the Unit is not reg-
istered in the scan list.
07, 15 Remote I/O
Communica-
tions Flag
ON Unit Indicates that normal remote I/O communications were conducted
with the slaves at all set connections.
This bit turns OFF if a timeout occurs in at least one connection with
multiple connections set.
OFF Unit Indicates that remote I/O communications failed (no slave present,
no scan list registered, verification error, structure error) or that a
communications error is occurring.
Bit Name Status Controlled
by
Unit operation