Use of EL33xx in the TwinCAT System Manager

In the full configuration (all possible PDOs activated, see PDO assignment), the EL3314, for example, offers the following process data for use:

Fig.122: EL3314 process data

In the case of the EL3314, 4 sets of process data are available, one for each measurement channel.

• Underrange: Measurement is below range
• Overrange: Range of measurement exceeded ("Cable break" together with "Error")
• Limit 1*: Limit value monitoring 0: ok, 1: Limit value overshot, 2: Limit value undershot
• Limit 2*: Limit value monitoring 0: ok, 1: Limit value overshot, 2: Limit value undershot
• Error: The error bit is set if the process data is invalid (cable break, over-range, under-range)
• TxPDO State: Validity of the data of the associated TxPDO (0 = valid, 1 = invalid).
• TxPDO Toggle: The TxPDO toggle is toggled by the slave when the data of the associated TxPDO is updated. This allows the currently required conversion time to be derived.
• CJCompensation: Externally measured temperature of the reference measuring point for cold junction compensation

*) not for EL3318

For detailed information on settings and operating modes, please read the chapter "Process data and operating modes".