Specifications

29
Error Messages Section 4-4
5ECRC BCC......................Checking of BCC1 or BCC2 has
revealed a transmission error.
6E
PARITY.........................Detection of a parity error.
16 E
OVERRUN......................The interrupt service routine
has not picked up the received
characters quickly enough from
the SIO.
Possible cause for the error:
- Programming error in the terminal.
17 E
NAK............................Error bit in ZBS has been set.
Possible causes for the error:
- The PLC has detected that an error (e.g. parity error) has occurred
during transmission of the telegram from the Terminal to the PLC.
- PLC is in the stop-mode.
40 E
SYS ADDRESS ................Undefined system variable or
invalid slave number 255
51 E
POLL NR ......................After transmitting a write or read
request to the function block in
the PLC, no response has been
received within the maximum
number of poll attempts (100).
Possible causes for the error:
- Function block FB201 in the PLC is not being executed.
- PLC is in the stop mode.
- PLC is overloaded and is therefore not capable of assembling the
response quickly enough (unlikely).
52 E
RECV ADDR...................The address received during
the addressing phase does not
correspond to the transmitted
address.
Possible cause for the error:
- Transmission error not identified
despite of parity check.
53 E
QV BIT.........................The request bit (ZBS) for inter-
node communication is set to
logic 1.
Possible cause for the error:
- The SINEC L1 interface in the PLC is not accessed by the function
block FB201 exclusively (PLC-application program error).