User manual

IEC61131 User and Reference Manual
April 22, 2008
449
First
Octet
Bit
Description
 Indicates memory allocation error in the slave, or
 For master in mimic mode indicates communication failure with the
slave device.
7
Device restarted (set on a power cycle)
IIN Second Octet
6
5
4
3
2
1
0
7
Bit Number
Second
Octet
Bit
Description
0
Function Code not implemented
1
Requested object unknown or there were errors in the application data
2
Parameters out of range
3
Event buffer overflowed
Indicates event buffer overflow in the slave or master. The slave will set
this bit if the event buffer in the slave is overflowed. The master will set
this bit if the event buffer in the master has overflowed with events read
from the slave. Ensure the event buffer size, in the master and slave, is
set to a value that will ensure the buffer does not overflow and events are
lost.
4
not used (returns 0)
5
not used (returns 0)
6
not used (returns 0)
7
not used (returns 0)