Link type - end of sequence, Link type - comm trigger, E.4 system-wide link types – Delta RMC101 User Manual
Page 894: E.4.1 link type - end of sequence, E.4.2 link type - comm trigger
RMC100 and RMCWin User Manual
E-4
E.4 System-wide Link Types
E.4.1 Link Type - End of sequence
Link
Type:
0 (hex 0x00, dec 0)
Link
Value:
Reserved - must be 0
When this Link Type is encountered the step sequence stops: no additional steps are executed
unless they are started as a new sequence. We recommend using Step 0 as the last Step of all
chains so they all end in a known spot. If Step 0 is used this way, its link type must be zero.
E.4.2 Link Type - Comm Trigger
Link
Type:
CommTrig (C, hex 0x43, dec 67)
Link
Value:
Sync Value
Range:
0 to 65,535
Note:
This link type is available only in RMC100 CPU firmware version 20010123 and later.
This link type is used to synchronize execution of the step table with changes made externally
from the PLC or other controlling system (called master below). This link type pauses the step-
sequence execution until the master indicates it is ready by changing the Link Value or Extended
Link Value. This function is useful when the master updates information in the RMC each
machine cycle.
The RMC maintains an internal Extended Link Value for each axis; each is initialized on RMC
power-up to 0. When the CommTrig (C) link type is encountered, the Link Value is compared with
the Extended Link Value for the axis running the event sequence:
• If they are equal: No action is taken; the event sequence will continue to wait for a difference.
• If they are not equal: The Link Value will be copied into the Extended Link Value for the axis
running the event sequence, and the link will be taken to the step indicated by the Link Next field.
There are two ways to trigger this link type to proceed:
• Change the Extended Link Value: This can be done by issuing a Set Extended Link Value (l)
command. When this value is changed, the link type will reset it back to the Link Value, so it is
possible to trigger using the same value each time, as long as it is different from the Link Value.
• Change the Link Value: This can be done by writing directly to the event step's Link Value field