lancer XBT-L1000 Manual De Instrucciones página 17

The different flashing rates are :
- Six flashes per second.
Normal subscriber operating state.
The subscriber receives and passes on the token without any difficulty. The lights of all
the subscribers should flash at the same rate.
- One flash per second.
The subscriber operates off-line just after power up, or after receiving a message from another
subscriber designated by the same address (duplicate addresses are not permitted). In this
state, the subscriber checks the network and prepares a table of active subscribers and those
with a token. It remains in this state for five seconds and then tries to return to its normal
operating state.
- Two flashes, then light off for 2 seconds.
The subscriber sees the token passing between the subsribers, without ever
receiving it.
Check the presence of an open circuit , or short-circuit on the network or a defective
connection.
- Three flashes, then light off for 1.7 seconds.
The subscriber sees no other subscribers. It regularly asks to obtain the token without finding
another subcriber to pass it to.
Check the presence of an open circuit, or short-circuit on the network or a defective
connection.
- Four flashes, then light off for 1.4 seconds.
The subscriber has received a correct message from another subscriber who uses the
same address as this subscriber. The subscriber remains off-line in this state as long as it
sees the duplicate address.
If the duplicate address is not seen for 5 seconds, the subscriber changes to one flash every
second.
Note :
this rate of flashing is seen on an automatic standby system when a PLC changes from main
to standby state.
TXBT signalling
Signalling of the LEDs of board TSXMBP100 is described in the relevant documentation
delivered with the board.
- Behaviour at the occurence of errors :
- Display: "??????..." at transmission error :
format / parity / CRC / non-response or exception response.
- Display of check marks for the graphic objects upon no answer or defective communication
function,
- No repetition upon no answer.
W9 152 6284 0111 A 04
Modbus Plus protocol
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09 - 1999