Parker IQAN-XA2 - Current Mode Output Failures

35
Failure Modes
Appendix D
Instruction book, IQAN-XA2
Failure modes in Current Mode
The table below presents failure modes and effects on I/O.
Failure mode
Effect
a
a.Turning off outputs are controlled by CAN master and therefore delayed by maximum
2 bus cycles. If local error handling is enabled the output will turn off locally without
delay.
1 COUT Open COUT error, output turned off
2 RET (active) Open COUT error, output turned off
3 RET (passive) Open Not detected, will not influence function
4 COUT Short-circuit to RET
(active)
COUT error, output turned off
b
5 COUT Short-circuit to RET
(passive)
Not detected, will not influence function
6 COUT Short-circuit to +BAT COUT error, output turned off
7 COUT Short-circuit to - BAT
COUT error, output turned off
b
8 RET (active) Short-circuit to
+BAT
COUT error, output turned off
b
9 RET (active) Short-circuit to
- BAT
COUT error, output turned off
10 RET (passive) Short-circuit to
+BAT
Not detected, will not influence function
11 RET (passive) Short-circuit to
- BAT
COUT error, output turned off
12 COUT Short-circuit to 2:nd
COUT (passive)
Not detected, will not influence function
13 COUT Short-circuit to 2:nd RET
(active)
COUT error, output turned off
b
b.Turned off by integrated protection functions in IC.
14 COUT Short-circuit to 2:nd RET
(passive)
Not detected, will not influence function
15 RET Short-circuit to 2:nd RET
(active)
COUT error, output turned off
16 RET Short-circuit to 2:nd RET
(passive)
Not detected, will not influence function
17 Insufficient Voltage COUT error, output turned off