S5-95U, SINEC L2 Integral Standard Function Blocks L2-SEND and L2-RECEIVE
Note
In the case of the FMA services ( section 3.4), the error codes 7
hex
to C
hex
in bits 4 to
7 of the status byte do not exist for L2-RECEIVE.
Table 5-8. Error Codes in the Status Byte (Bits 4 to 7)
Value of Bits 4 to 7
in STB
(hexadecimal)
0
Significance of the Error Codes
No error
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7
8
9
Local medium busy
No data buffer is available for processing the job.
Remedy • Retrigger the job after a waiting period.
• Reconfigure to decrease the L2 load.
Remote medium busy
No input buffer is available for the job on the remote programmable
controller (still occupied by the previous job input).
Remedy: • Use L2-RECEIVE to accept the "old" data in the remote
programmable controller.
• Repeat the transmit job in the transmitting programmable
controller.
Remote error
The remote programmable controller acknowledges the job negatively,
for example because the SAP assignment is incorrect ( Appendix B).
Remedy: Reconfigure (correct) the connections.
C
A
The remote programmable controller is in the STOP mode
Recognition of PLC STOP works only with the PLC to PLC connection
and then only if the destination station is an S5-95U and if the
destination station was configured properly.
Connection error
The transmitting programmable controller or the receiving
programmable controller is not connected to the bus.
Remedy: Switch the systems on or connect the systems and test the
bus connections.
4 Overload, access to L2 interface is not possible
EWA 4NEB 812 6112-02
5-7
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