Diagnostics and Troubleshooting - User Interface

Table 27 - Controller Module Diagnostics

OI Screen

OI Screen

Number of

Possible Cause

Control File Action

User Action

Item

Item Value

LED

 

 

 

 

 

Strobes

 

 

 

 

INVALID

2

A configuration that

An empty database is

Download a valid

 

CONFIG.

 

exceeds the loop

created.

configuration.

 

 

 

capacity of the

 

 

 

 

 

controller was

 

 

 

 

 

downloaded or an

 

 

 

 

 

invalid configuration

 

 

 

 

 

exists.

 

 

 

SWITCH

2

A failure is detected in

1. All control blocks stop

Replace CPU.

 

FAULT

 

the switch reading.

running

 

 

 

 

 

2. All I/O scanning

 

 

 

 

 

ceases. This forces the

 

 

 

 

 

modules into failsafe.

 

SYSTEM

NO MASTER

2

There are slave

1. MSTRFAIL pins on

1. Configure one of the

 

PORT

 

blocks in the

ASYS and FSYS

ports as a master.

 

 

 

configuration, and no

blocks turn on.

2. Download a

 

 

 

communication port

2. All Modbus slave and

 

 

 

configuration that

 

 

 

configured as a

 

 

 

Modbus read blocks

has no slave blocks.

 

 

 

Modbus master.

 

 

 

freeze their output pins

 

 

 

 

 

 

 

 

 

 

to the last value.

 

 

 

 

 

3. All slave blocks have

 

 

 

 

 

their BAD COMM pin

 

 

 

 

 

on.

 

 

 

 

 

4. All slave blocks have

 

 

 

 

 

their NO SCAN pin on.

 

 

 

 

 

5. IN SCAN STATUS is

 

 

 

 

 

set to NO for all slaves.

 

 

 

 

 

6. COMM STATUS is set

 

 

 

 

 

to BAD for all slaves in

 

 

 

 

 

the function block

 

 

 

 

 

diagram.

 

 

 

 

 

7. Statistical counters for

 

 

 

 

 

all slaves are 0.

 

CPU

GOOD

N/A

N/A

N/A

N/A

 

 

 

 

 

 

 

WATCHDOG

3

Watchdog reset

1. Associated rack

1. Force a cold start.

 

 

 

resulting from

monitor block’s RACK

2. Upgrade control file

 

 

 

software failure

OK pin is turned off.

 

 

 

software.

 

 

 

 

2. ASYS block’s HW OK

 

 

 

 

3. Replace CPU board.

 

 

 

 

pin is turned off.

 

 

 

 

4. Contact Honeywell

 

 

 

 

 

 

 

 

 

 

Personnel.

 

PREFETCH

3

CPU failed when

1. Controller performs a

1. Force a cold start.

 

ABORT

 

attempting to fetch an

restart

2. Isolate system from

 

 

 

instruction from the

 

 

 

 

2. Associated rack

noise and force a

 

 

 

prefetch register.

 

 

 

monitor block’s RACK

cold start.

 

 

 

 

 

 

 

 

OK pin is turned off.

3. Replace CPU board.

 

 

 

 

3. ASYS block’s HW OK

 

 

 

 

 

 

 

 

 

pin is turned off.

 

 

ADDRESS

3

The reserved

See PREFETCH

1. Force a cold start.

 

ERROR

 

exception occurred for

ABORT.

2. Isolate system from

 

 

 

an unknown reason.

 

 

 

 

 

noise and force a

 

 

 

 

 

 

 

 

 

 

cold start.

 

 

 

 

 

3. Replace CPU board.

 

 

 

 

 

 

 

UNDEFINE

3

Bad Instruction

See PREFETCH

See PREFETCH

 

ERROR

 

Detected

ABORT

Abort

122

HC900 Hybrid Controller Installation and User Guide

Revision 5

 

 

9/03

Page 131 Page 133
Page 132
Image 132
Honeywell HC900 manual Abort
Page 131 Page 133

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