S5-95F on SINEC L1 S5-95F
Contents of the Condition Code and Control Byte for Receive (DR 0 in 95F Message Mode)
Condition Code Byte for Receive
7 6 5 4 3 2 1 0
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0: Frame valid (operating system resets bit in the RESTART
routine and following depassivation via FB255)
1: Frame invalid. Safety time expired.
Depending on how DB1 was initialized, the system either
reacts with a PLC STOP or responds as programmed at the
user level. No other frames are transferred to the Receive
Mailbox as long as this bit is "1".
0: o.k.
1: Monitoring time for data transfer via subunit A expired. Fault
is tolerated on high-availability L1 bus. The operating system
resets this bit when a valid frame is received.
0: o.k.
1: Monitoring time for data transfer via subunit B expired. Fault
is tolerated on high-availability L1 bus. The operating system
resets this bit when a valid frame is received.
0: o.k.
1: Useful frame lost; internal useful frame counter incorrectly
incremented. Safety time will not be restarted as long as this
bit is "1".
The operating system resets the bit following successful
depassivation.
0: o.k.
1: Frame on subunit A rejected, internal change byte is not
altered. The safety time is not restarted as long as this bit is
"1".
The operating system resets the bit following successful
depassivation.
0: o.k.
1: Frame on subunit B rejected, internal change byte is not
altered. The safety time is not restarted as long as this bit is
"1".
The operating system resets the bit following successful
depassivation.
0: o.k.
1: Bit for depassivation of the data paths. When this bit is set,
the internal timer which monitors the SINEC L1 safety time
is restarted and bits 3, 4 and 5 reset.
Bit is reset
- by the operating system when an error-free frame was
received within the specified safety time
- when the safety time has expired
0: At least one valid frame received.
1: No valid frame received.
13-22
EWA 4NEB 812 6210-02
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