6.6 Latch Function
6.6.1 Continuous Latch by LT_REQ2 Bit
6-14
Operation when Latching is not Completed
Latch Time Lag
•
From reception of the command to latching start: 250
μ
s 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.
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."
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
Note: If Pn850 is set to "0" and LT_REQ2 to "0", normal latching will be performed.
OFF
ON
LT_REQ
LT_RDY
L_CMP
OFF
ON
OFF
ON
OFF
ON
Latch condition not e
s
tabli
s
hed
Latch
s
ignal
Latche
s
the
s
equence
s
ignal 1 input po
s
ition.
Latche
s
the
s
equence
s
ignal 2 input po
s
ition.
Repeat
s
m time
s
Latche
s
the
s
equence
s
ignal n input po
s
ition.