Beckhoff EL1502, Документация

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Commissioning
EL1502, EL1512 119 Version: 3.5
DC settings for EL1502
Fig. 145: Advanced Settings for Distributed Clock (DC), EL1502 terminal
• 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 EL1502 relative to other terminals and the
global SYNC pulse in nanosecond steps. If the inputs of multiple EL1502 terminals are to be read at
the same time, 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/
Device EtherCAT/tab EtherCAT/Advanced Settings/Distributed Clocks/Input Shift Time/, see Fig.
Activation of PDOs 0x1600, 0x1601 and 0x1A00, 0x1A01 - index 0x8000:04 for setting the counting
direction ). As a result, all the input terminals in the system (EL1xxx, EL3xxx) 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.
• 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 EL1502.