Mitsubishi MELSEC-A series Programming Manual

5. SEQUENCE INSTRUCTIONS
5 − 27
MELSEC-A
Functions (1) Reverses the output status of the device, (D1), on the leading edge of the
output reverse command.
(2) Though (D2) is a dummy data, specify any device number indicated with the
mark for it. If a bit device is specified for (D2) , specify the digit with K1 to K4.
Specify any value since this digit specification value is a dummy data.
Device specified for (D2) can be used freely for other purposes.
(3) The CHK instruction is only executed in refresh mode.
(4) The output reverse command on/off period must be equal or greater than 1 scan
time.
Program Example CHK
The following program reverses the output status of Y10 when X9 is switched on.
X005
K4
CHK Y010 M1
X5 OFF
Y10 ON
OFF
ON
0
X009
CHK Y010 D0
• Coding
0 LD X009
1 CHK Y010 D0
6 END

Mitsubishi MELSEC-A series Specifications

General

Type	Programmable Logic Controller (PLC)
Series	MELSEC-A
I/O Capacity	Varies depending on the CPU and expansion modules used.
I/O Points	Varies depending on the CPU and expansion modules used.
Programming Language	Instruction List
Program Memory	Varies by model
Data Memory	Varies by model
Communication Protocols	MELSECNET
Communication Ports	Varies by model
Power Supply	AC 100-240V, DC 24V (varies by model)
Expansion Modules	Available (varies by model)
I/O Modules	Digital, Analog
Memory	RAM, EEPROM
Operating Temperature	0°C to 55°C
Storage Temperature	-25°C to 75°C
Humidity	5 to 95% RH, non-condensing
Vibration Resistance	10 to 57Hz: 0.075mm amplitude, 57 to 150Hz: 9.8m/s²