Beckhoff EL3783, Документация

Страница: 136 / 188

Commissioning
EL3783 136 Version: 1.1
Bit SW.7 SW.6 SW.5 SW.4 SW.3 SW.2 SW.1 SW.0
Name - ERROR - - Limit 1 Overrange Underrange
Table 1: Legend
Bit Name Description
SW.15 TxPDO
Toggle 1
bin
Toggles with each new analog process value
SW.14 TxPDO State 1
bin
TRUE in the case of an internal error
SW.13* Sync error 1
bin
TRUE (DC mode): a synchronization error occurred in the expired
cycle.
SW.6 ERROR 1
bin
General error bit, is also set together with overrange and underrange
SW.3 Limit 1 1
bin
See Limit [
}
140]
SW.2 1
bin
SW.1 Overrange 1
bin
Analog input signal lies above the upper permissible threshold for this
terminal
SW.0 Underrange 1
bin
Analog input signal lies under the lower permissible threshold for this
terminal
Control word
The EL3783 has no control word
Synchronization, trigger and conversion time
The EL3783 generally operates in oversampling mode. It can be operated with and without Distributed
Clocks activated.
Distributed Clocks activated
• the EtherCAT system-wide synchronized Distributed Clocks also encompass this EL3783
• the terminal then operates synchronously with all other DC devices
• the sampling clock is derived from the local DC in the EtherCAT slave controller (SYNC0:
Oversampling, SYNC1: Provision of the data)
Advantages
• several EL3783 record the measured values of all their channels synchronously
• accurate time stamp of the individual samples
Cycle times
The minimum EtherCAT cycle time for the EL3783 is 50 µs (see table in chapter “Quickstart”).
In order to activate Distributed Clocks, "DC" is to be selected in the Predefined PDO list, so that amongst
others the time stamp PDO is selected
Fig. 174: EL3783 Selection dialog "Predefined PDO Assignment"
The permissible oversampling rates are set via the System Manager DC tab: