Controller Diagnostics; Table 19 Rack N Diagnostics - Honeywell 900 User Manual

Controller Diagnostics

Controller Diagnostics
Select a rack number to see its diagnostics. For I/O diagnostics and details, see pages 42 and 43.
Item Status
Rack YES
Configured?
NO
Controller
GOOD
Status
FORCED OUTPUT A block has an output
INVALID CONFIG.
SWITCH FAULT
NO MASTER
PORT
Revision 9
May 2014

Table 19 Rack n diagnostics

Possible Cause Controller Action
N/A N/A
N/A N/A
N/A N/A
None
that is forced.
A configuration that An empty database is
exceeds the loop created.
capacity of the
controller was
downloaded or an
invalid configuration
exists.
A failure is detected in 1. All control blocks stop
the switch reading. running
2. All I/O scanning ceases.
This forces the modules
into failsafe.
The controller The controller is not
configuration contains scanning the Modbus
at least one Modbus slave devices.
slave block, but
neither the RS-232
nor the RS-485 port is
set up as a Modbus
Master port.
900 Control Station User Guide
Main Menu
Diagnostics
What to do
N/A
N/A
N/A
Remove force on block output..
Download a valid configuration.
Replace CPU.
Select Modbus Master or Modbus
Master Advanced protocol for either the
RS-232 or RS-485 port.
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