JUMO mTRON T Manual page 54

4 Serial transmission modes
PLC as a slave
A slave continuously waits for reception and only transmits if it is requested to do so by the mas-
ter.
The parameters for the end identifier conditions must be set as follows:
possibly: length = x bytes
response time-out = 0 ms (endless)
possibly: character time-out T2 = y ms
One of the two conditions – length or character time-out – must be set so that a started receiv-
ing package can be detected as completed.
PLC as a unidirectional slave (barcode)
When connecting a barcode scanner, the slave also continuously waits for reception while the
transmission direction is always disabled.
In this case, the correct package formation is particularly important: if a label is read, its content
must be transmitted in a single string. To do this, the start and end of the text must be reliably
detected. Character time-outs of 75 ms are usual.
The parameters for the end identifier conditions must be set as follows:
possibly: length = x bytes
response time-out = 0 ms (endless)
possibly: character timeout T2 = y ms
One of the two conditions – length or character time-out – must be set so that a started receiv-
ing package can be detected as completed.
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