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Instruction Manual
IM-106-880C, OI
September 2009
Hazardous Area OCX 8800
7-22
Transducer Block
Channel Status
The status of channel 1 to 4 are affected by the state of unit alarm. In all
cases, the channel will read what it believes the correct sensor values.
Self-Clearing alarms are reset when the alarm condition goes away. All others
require the device be restarted.
Table 7-18 indicates channel status under indicated device conditions
(Occurence). Unless otherwise indicated in the table, the status values are:
• Occurence: Normal
• Quality Value: GOOD
• Quality Substatus Value: NON_SPECIFIC
• Limit Value: NOT_LIMITED
Table 7-18. I/O Channel Status
Transducer Block
Simulate
Setting PWA_SIMULATE to ON also allows simulating TB status and to check
the correct mapping onto the PWA’s FAILED_ACTIVE, MAINT_ACTIVE, and
ADVISE_ACTIVE parameters.
Support Transducer
Block Errors
Out of Service
Set whenever the transducer block actual mode is OOS.
Input Failure
Set whenever there is a communication error between the Fieldbus A2D card
and the OCX.
Simulation Active
Set whenever the Fieldbus Simulate Switch is set to ON at the Fieldbus A2D
card or software simulate option is enabled.
Other Error
Set whenever XD_ERROR is non-zero.
Channel Occurence Quality Value Quality Substatus Value Limit Value
1,2 Powerup, Warmup, Stablize BAD NON_SPECIFIC NOT_LIMITED
1,2 Normal GOOD NON_SPECIFIC NOT_LIMITED
1,2 Calibrating, Cal Verify, Blow Back,
COe Zero,
UNCERTAIN SENSOR_CONVERSION_INACCURATE NOT_LIMITED
1,2 Alarm
(Temperature Low & High, Cell
Bad/Error)
UNCERTAIN SENSOR_CONVERSION_INACCURATE NOT_LIMITED
1,2 System Fault BAD DEVICE_FAILURE NOT_LIMITED
3,4 Powerup, Warmup, Stablize GOOD NON_SPECIFIC NOT_LIMITED
3,4 Normal GOOD NON_SPECIFIC NOT_LIMITED
3,4 Calibrating, Cal Verify, Blow Back GOOD NON_SPECIFIC NOT_LIMITED
3,4 Alarm, System Fault
(Temperature Related Alarms: T/C
Open, T/C Shorted, T/C Reversed,
ADC Error)
BAD DEVICE_FAILURE CONSTANT
3,4 Temp Low & High Good ACTIVE_BLOCK_ALARM NOT_LIMITED