Mitsubishi Electric MELSEC-Q/L - Timing Pulse Generation

754
7 APPLICATION INSTRUCTIONS
7.19 Other Instructions
Timing pulse generation
DUTY
*1 Only SM420 to SM424, SM430 to SM434 can be used.
Processing details
• Turns the user timing clock (SM420 to SM424, SM430 to M434), designated by (D), ON for the duration equivalent to the
number of scans specified by n1, and OFF for the duration equivalent to the number of scans specified by n2.
• Scan execution type programs use SM420 to SM424, and low speed execution type programs use SM430 to SM434.
• The following will take place if both n1 and n2 have been set for 0:
• The data designated by n1, n2, and (D) is registered with the system when the DUTY instruction is executed, and the timing
pulse is turned ON and OFF by END processing.
Operation error
• In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.
n1: Number of scans for ON (BIN 16 bits)
n2: Number of scans for OFF (BIN 16 bits)
(D): User timing clock (SM420 to SM424, SM430 to SM434) (bits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant
K, H
Others
Bit Word Bit Word
n1  
n2  
(D) 
*1
 
• n1=0, n20: SM420 to SM424 and SM430 to SM434 will stay OFF.
• n1>0, n2=0: SM420 to SM424 and SM430 to SM434 will stay ON.
Error
code
Error details Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4100 The values of n1 and n2 are less than 0. 
4101 The device specified in (D) is not from SM420 to SM424 or SM430 to
SM434.

Basic
Process
High
performance
Redundant Universal LCPU
Command
DUTY
n1 n2 D
DUTY
SM420 to SM424
SM430 to SM434
OFF
ON
n2 scansn1 scans