Mitsubishi MELSEC User Manual

9
EMC AND LOW VOLTAGE DIRECTIVES
10
LOADING AND INSTALLATION
11
MAINTENANCE AND INSPECTION
12
TROUBLESHOOTING APPENDICES INDEX
12
TROUBLESHOOTING
12.6 Special Reray List
12 - 69
(2) System information
(3) System clocks/counters
Table12.12 Special relay
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
CPU
SM203 STOP contact STOP status • Turns ON when the CPU is in STOP status. S (Status change)
QS
SM210
Clock data set
request
OFF: Ignored
ON: Set request
• Writes clock data stored in SD210 to SD213
to the CPU module after the END instruction
of the scan where the relay changes OFF to
ON has been executed.
U
SM211 Clock data error
OFF: No error
ON: Error
• Turns ON when an error is detected in the
clock data (SD210 to SD213) and turns OFF
if no error is detected.
S (Request)
SM213
Clock data read
request
OFF : Ignored
ON : Read request
• Reads clock data to SD210 to SD213 in BCD
value when the relay is ON.
U
SM232
Number of
writes to ROM
OFF : Within the number
of writes
ON : Over the number of
writes
• Turns ON when the number of writes to ROM
exceeds 100,000.
S (Error)
Table12.13 Special relay
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
CPU
SM400 Always ON • Normally is ON S (Every END)
QS
SM401 Always OFF • Normally is OFF S (Every END)
SM402
After RUN, ON
for 1 scan only
• After RUN, ON for 1 scan only. S (Every END)
SM403
After RUN, OFF
for 1 scan only
• After RUN, OFF for 1 scan only. S (Every END)
SM410
0.1 second
clock
• Repeatedly changes between ON and OFF
at each designated time interval.
• When PLC power supply is turned OFF or a
CPU module reset is performed, goes from
OFF to start.
S (Status change)
SM411
0.2 second
clock
SM412 1 second clock
SM413 2 second clock
SM414
2n second
clock
• This relay alternates between ON and OFF at
intervals of the time (unit: s) specified in
SD414.
• When PLC power supply is turned OFF or a
CPU module reset is performed, goes from
OFF to start.
S (Status change)
ON
OFF
ON
OFF
ON
OFF
1 scan
ON
OFF
1 scan
0.05s
0.05s
0.1s
0.1s
0.5s
0.5s
1s
1s
ns
ns

Mitsubishi MELSEC Specifications

General

Category	Programmable Logic Controller (PLC)
Manufacturer	Mitsubishi Electric
Series	MELSEC
Programming Languages	Ladder Diagram (LD), Function Block Diagram (FBD), Structured Text (ST), Instruction List (IL), Sequential Function Chart (SFC)
Communication Protocols	Ethernet, CC-Link, RS-232, RS-485, USB, Profibus, Modbus
Model Series	FX, Q, L, iQ-R, iQ-F
Input Voltage	100-240V AC, 24V DC (varies by model)
Memory Capacity	Varies widely depending on the CPU module and series. Ranges from kilobytes to megabytes.
I/O Points	16 to 8192 points (varies by model)
Communication Ports	Ethernet, RS-232, RS-485, USB (varies by model)
Programming Software	GX Works2, GX Works3, GX Developer
Operating Temperature	0°C to 55°C
Storage Temperature	-25°C to 75°C
Humidity	5% to 95% (non-condensing)
Vibration Resistance	10 to 57Hz, 0.075mm amplitude; 57 to 150Hz, 9.8m/s² acceleration
Shock Resistance	147m/s², 3 times in each direction (X, Y, Z)
Protection Class	IP20 (varies by model)
CPU Processing Speed	0.02μs to 0.1μs per instruction (varies by model)