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8
Error handling in the control interface / check-back interface
8.1
Error messages of the module
In addition to the higher-level operation- and application relevant diagnostic messages (→ see
page 24), each channel of the XNE-2CNT-2PWM also reports channel specific errors via the
Process input / check-back interface (page 28).
A distinction is made between:
• volatile status messages (STS)
Display of current states (for example CNT/PWM function enabled, CNT/PWM active,
CNT/PWM special function active, etc.), → see Process input / check-back interface
(page 28).
and
• non-volatile flags (MSG)
Non-volatile storage of messages/events (for example overflow, zero crossing, etc.) which
could possibly get lost due to their time behavior.
8.1.1
Non-volatile flags (MSG)
MSG for CNTx
• CNT1: Process input / check-back interface, byte 1
• CNT2: Process input / check-back interface, byte 3
Table 21:
Designation
MSG for CNTx
MSG_CNTx_CMP0
MSG_CNTx_CMP1
MSG_CNTx_UFLW
MSG_CNTx_OFLW
MSG_CNTx_ND
MSG_CNTx_FQE
MSG_CNTx_SFT
MSG_CNTx_SW_LR
XI/ON: XNE-2CNT-2PWM 04/2011 MN05002035Z-EN www.eaton.com
8 Error handling in the control interface / check-back interface
Description
Checking the count value for reaching the
compare value 0.
Checking the count value for reaching the
compare value 1.
Checking the count value for an underflow.
Checking the count value for an overflow.
Checking the count value for a zero crossing.
No counter pulse received within a defined time (definition in REG_CNTx_TO (page 93 or
page 94)) although the count operation is enabled.
If count pulses were received, is only monitored while the count operation is enabled
(STS_CNTx_RUN=1).
The event according to the parameterized special function occurred (→ see Special function of
inputs Z1 and Z2 at CNTx (page 45)).
A software latch retrigger has been executed. CNTx_SW_LR of the counter in the control
8.1 Error messages of the module
Triggering event
REG_CNTx_CNT = REG_CNTx_CMP0
REG_CNTx_CNT = REG_CNTx_CMP1
REG_CNTx_CNT = REG_CNTx_UFLW
REG_CNTx_CNT = REG_CNTx_OFLW
REG_CNTx_CNT = 0
interface changes from 0 → 1
85
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