I post copy of my e mail to AB
I hope it describe all.
> The Ethernet network includes 6 SLC 5/05 PLCs and one SLC 5/03, 1747-L531E
> with 8K and OS302 Series C PLC with ENI. The PLC has DH485 port connected
to
> AIC+, DF1 port connected to ENI and additional 1747-KE module.
>
> As part of the operation I tried to read from the SLC 5/03 PLC. The SLC
5/05
> PLCs initiate the reading procedures and the SLC 5/03 never initiates a
> call.
> The ENI IP address is 130.131.100.9. The DF1 Source ID is 9.
>
> I first tried to call from SLC 5/05, 1747-L551B with 16K and OS501 Series
C.
> This is the newest SLC 5/05 we have and we bought it with the SLC 5/03
PLC.
> With this PLC we have no problem using MSG with MultyHop to read from the
> SLC 5/03 PLC. This PLC IP address is 130.131.100.6
>
> Then, I tried to initiate the same call from SLC 5/05, 1747-L551 with 16K
> and OS501. , IP address is 130.131.100.2. I inserted the same MSG with
> MultyHop, IP address of the ENI and Backplane 0. The software (RSLogic
5.20)
> accepts the rung without warning. When I test the program and the PLC try
to
> execute the MSG command the PLC crashes with major error 65 HEX. I see the
> error message in the Processor Status, Errors tab: "Communication port
error
> number 65 HEX. See manual for more details" (not exactly, I don't
remmember
> the exect phrase). This message number does not appears in the help nor in
> the reference book. As a result the PLC goes out of RUN and the Fault and
> Ethernet lamps are blinking in red. The Ethernet port is disconnected and
I
> must go to the DH485 port (with AIC+) to reset the fault and read the
> software. In order to use the Ethernet port I must power off the PLC! Pay
> attention that the problem appears only if the MSG command is executed. Is
> the MSG command exists but disabled the PLC doesn't crash.
>
> I tried several times and each time I had to go locally to the DH485 port
to
> reset the fault and change the program. foolish!
> I tried again with another PLC, SLC 5/05, 1747-L551 with 16K and OS500, IP
> address 130.131.100.3, and got the same problem.
>
> You are right. The MSG command should never stop the PLC program, and
> obviously not disconnect it!
>
> Thanks in advance, and waiting for quick solution...
>
> Arik Ben-Yehuda
> Barak Electrical Control Systems