Rockwell Automation 1769-SDN Compact I/O DeviceNet Scanner Module User Manual - Manual (Page 89)

Publication 1769-UM009E-EN-P - August 2009 89
DeviceNet I/O Image Chapter 6
Device Failure Array
These 64 bits provide status information for use in your control program. For
each slave device owned by the scanner, you should monitor the respective bit
within these four words. If a slave device faults, the bit that corresponds to that
node address will be set (1). If a slave device is not faulted or returns from a
faulted state to an operating state, the corresponding bit for that node will be
cleared (0).
Autoverify Failure Array
These four words allow the control program to monitor if a slave’s Device Key
and Size matches the Device Key and Size in the scanner. A bit value of 0
(OFF) represents a configuration match, a bit value of 1 (ON) represents a
mismatch.
Slave Device Status Information
Input Word Bit 0...15 Description
2
(1)
(1) Bit 0 corresponds to Node 0, Bit 1 corresponds to Node 1 … Bit 15 corresponds to Node 15.
Node 0…15 Bit ON (1) = Slave node faulted
Bit OFF (0) = Slave node not faulted 3
(2)
(2)
Bit 0 corresponds to Node 16, Bit 1 corresponds to Node 17 … Bit 15 corresponds to Node 31.
Node 16…31
4
(3)
(3) Bit 0 corresponds to Node 32, Bit 1 corresponds to Node 33 … Bit 15 corresponds to Node 47.
Node 32…47
5
(4)
(4) Bit 0 corresponds to Node 48, Bit 1 corresponds to Node 49 … Bit 15 corresponds to Node 63.
Node 48…63
ATTENTION
A value of 0 does not indicate that the slave has been brought
online or is functional, only that there is a configuration match
between the slave and the scanner.