Hour Meter - Mitsubishi Electric MELSEC-Q/L Programming Manual

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Hour meter

• QnUDVCPU, LCPU: The serial number (first five digits) is "16112" or later.

(S): Start number of the device where the data of the time (to be set in increments of hour) during which (D2) is turned ON (BIN 16 bits)

(D1): Start number of the device where the data of the current value in increments of hour is stored (BIN 16 bits)

(D2): Start bit device number to which an alarm is to be output (Bit)

Internal device

Processing details

• (D2) turns ON when the cumulative ON time of command input exceeds the time (in increments of hour) specified by (S).

The current value is stored in increments of hour in the device specified by (D1) and the current value less than a hour is

stored in increments of second in the device designated by (D1)+1.

Command input

• Measurement is continued even after the alarm output (D2) turns ON.

• Measurement is stopped when the current value (D1) per hour reaches the maximum value (32767) and the current value (D1)+1 per second reaches the

maximum value (3599). To continue measurement, clear the current value in the devices specified by (D1) to (D1)+1.

• The change of clock data does not affect the operation of the HOURM instruction.

The following programs cannot be used by the HOURM instruction.

• Interrupt programs

• Fixed scan execution type programs

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 data specified by (S) is smaller than 0.

The device specified by (D1) exceeds the range of the number of device

Program example

• The sample program turns on Y5 when the cumulative ON time of X0 exceeds 72 hours.

[Ladder Mode]

7 APPLICATION INSTRUCTIONS

7.15 Clock Instructions