Basics communication
EL5101, EL5101-0010, EL5101-0011
32
Version: 4.2
•
SYNC0
Sync unit cycle: a multiple of the bus cycle time. The counter value is periodically determined at this
interval (in µs).
•
User-defined
Arbitrary number up to 2
32
ns ≈ 4.3 secs. Decimal point values are possible.
•
Shift Time
The Shift Time can be used to shift the SYNC0 pulse for this EL51xx relative to other terminals and the
global SYNC pulse in nanosecond steps. If the data of several EL51xx terminals are to be read
simultaneously, the same value must be entered here.
•
Based on input reference
If this option is activated an additional Input Shift is added to the configurable terminal-specific SYNC0
shift (user-defined). This value is calculated and made available by the EtherCAT master (SysMan/
EtherCAT device/EtherCAT tab/Advanced Settings/Distributed Clocks/Input Shift Time/, see Fig.
EtherCAT Master, EtherCAT tab, Advanced Settings
+
EtherCAT Master, Advanced Settings,
Distributed Clock
). In this way
all
input terminals in the system (EL1xxx, EL3xxx and appropriately set
ELxxxx such as the EL51xx) read their inputs as close as possible to the time of the EtherCAT frame
that will fetch them, thereby supplying the most recent possible input data to the controller. In input-
based mode this value is taken into account automatically.
•
Enable SYNC0
Automatically activated in DC Synchronous operating mode.
•
SYNC1
Additional SYNC pulse, derived from SYNC0 or from the DC itself. Not required by the EL51xx.
DC settings for EtherCAT master
Higher-level distributed clock parameters can be modified under advanced settings for the EtherCAT master.
Refer also to the basic introduction to the topic of EtherCAT and Distributed Clocks; download: the
“
Distributed clocks system description
”.
Fig. 21: EtherCAT Master, EtherCAT tab, Advanced Settings
Summary of Contents for EL5101
Page 2: ......
