KEYENCE Visual KV Series - Manual (Page 52)

1.4 Special Functions
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Chapter 1 Programming
1.4.7 Special Functions
Constant Scan Time Mode
In this mode, operation can take place according to a preset scan time (in ms).
■ Setting
Write the desired scan time into TM29 (temporary data memory), then turn on
special utility relay No. 2303. The scan time can also be written into TM31. Specify a
scan time in increments of 10 ms (a value of less than 10 ms is invalid).
Here, write a value into TM equivalent to 10 times the scan time.
Example
Set the constant scan time to 20 ms.
Note 1: The set value for the constant scan time must be greater than the actual
scan time. Otherwise, special utility relay 2304 turns on during every scan to disable
constant scan time mode.
Note 2: If the scan time exceeds the set value, special utility relay no. 2304 turns on
during the next scan.
Output Disabled Function
During checking of a program, this function clears output from output relays regard-
less of the program currently running.
■ Setting
Turn on special utility relay No. 2300. After one scan is completed, all output relays
(00500 to 00503, 07500 to 17915) are cleared.
Example
Use the output disabled function by executing FORCED RESET/RESET to special
utility relay No. 2300 from the monitor display.
➮ To execute FORCED RESET or RESET, refer to "Chapter 6 Handheld Programmer" (p.1-195).
Input Refresh Disabled Function
Set this function if it is desired to turn ON/OFF input relays from the monitor display
without activating the machine when checking a program.
■ Setting
Turn ON special utility relay No. 2301 to skip input refresh (reading from input
relays). Input relays can then be turned ON/OFF with the KV-P3E(01) or with KV
IncrediWare (DOS) on the monitor display.
Example
Set input relay No. 0000 to ON to disable input refresh; set to OFF to enable input
refresh.
Note: If input refresh is disabled, it is not enabled until input relay No. 0000 is turned
on from the handheld programmer.
LDA STA SET
02008 #00200 TM29 2303
0000 2301
KV-300 PLC only
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