Assignment Of The Err Parameter - Siemens SIMATIC S5 Manual

ERR parameter If an error occurs while the FB IM308C is running, the ERR parameter
contains information indicating the cause of the error.
If no error occurs, the group error bit in the ERR parameter is = 0.
Table 9-19 Assignment of the ERR parameter
15 ... 8 The length byte indicates the number of bytes transferred by the
7 ... 0
FB IM308C and If the FB IM308C accesses a DP slave for which the error-reporting mode is
QVZ "QVZ" and the slave in question is not accessible, "QVZ" is not reported:
instead, the corresponding error message is placed in the "ERR" parameter of
the FB IM308C.
Exception: If you switch the IM 308-C from STOP to OFF at this time, the
CPU reports "QVZ" for a short time.
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
IM 308-C – addressing, diagnostics and use of the FB IM308C
Parameter ERR
Length byte
Bit 15 Bit 8
Bit
FB IM308C.
The length byte is always updated when the FB IM308C is called
with LENG = –1 (joker length).
When the length byte is updated, the group error bit is not set.
Low byte: Information about an error (see Table 9-20)
The following bits have a special meaning:
Bit 7: Group 0: No error
error bit
1: Error
Bit 6: Error 0: No error
in the
1: Error
IM 308-C
Bit 5: Para- 0: No parameterization error
meterization
1: Parameterization error (at least one of the
error
parameters for the FB IM308C call is invalid)
Low byte
Bit 7 Bit 0
Meaning
9
9-33