Continuous Latch By Lt_Req2 Bit - YASKAWA S-7 Series Command Manual

6.6 Latch Function

6.6.1 Continuous Latch by LT_REQ2 Bit

 Operation when Latching is not Completed
 Latch Time Lag
• From reception of the command to latching start: 250 μs max.
• From completion of latching to transmission of a response: One communication cycle max.
6.6.1

Continuous Latch by LT_REQ2 Bit

This function sequentially latches the input positions of sequence signal 1 to sequence signal n
(n = 1 to 8) a specified number of times. The continuous latch operation can be aborted by set-
ting the LT_REQ2 bit to OFF (LT_REQ2 = 0). This function can shorten the time between latch
completion and the start of the next latch, and enables sequential latch operations at high
speed.
Repeats m times
 How to Start and Stop Continuous Latch Operation
Set the following parameters, and then set LT_REQ2 to "1" to start continuous latch operation.
To abort the operation, set LT_REQ2 to "0."
Note: If Pn850 is set to "0" and LT_REQ2 to "0", normal latching will be performed.
6-14
ON
LT_REQ
OFF
ON
LT_RDY
OFF
ON
L_CMP
OFF
ON
Latch signal
OFF
Latches the sequence signal 1 input position.
Latches the sequence signal 2 input position.
Latches the sequence signal n input position.
Pn850: Number of Latch Sequences n
Pn851: Continuous Latch Sequence Count m (When m = 0, the continuous latch oper-
ation will be infinitely repeated.)
Pn852: Latch Sequence 1 to 4 Settings
Pn853: Larch Sequence 5 to 8 Settings
Latch condition not established