Timing Pulse Generation - Mitsubishi Electric MELSEC-Q/L Programming Manual

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Timing pulse generation

Number of scans for ON (BIN 16 bits)

Number of scans for OFF (BIN 16 bits)

(D): User timing clock (SM420 to SM424, SM430 to SM434) (bits)

Internal device

*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.

SM420 to SM424

SM430 to SM434

• 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:

• 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.

• 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.

Error details

The values of n1 and n2 are less than 0.

The device specified in (D) is not from SM420 to SM424 or SM430 to

7 APPLICATION INSTRUCTIONS

7.19 Other Instructions

Redundant Universal