Mitsubishi Melsec-A A1SHCPU programmable controller, CPU unit

Mitsubishi Melsec-A series programmable logics are so called rack mountable models. All of the PLC components are mounted into a special purpose backplane which can be then mounted for example into the electrical cabinet.

Mitsubishi Melsec-A A1SHCPU unit technical details:

• Unit description:
  • CPU Unit with RS-422 communication
• Control system:
  • Repeated operation (using stored program)
• Program capacity:
  • 8K memory
    • 131 basic instructions
    • 105 sequence instructions
    • 185 application instructions
    • 11 CC-link dedicated instructions
• I/O Control method (selectable):
  • Refresh mode
  • Direct mode
• Prosessing speed (sequence instructions):
  • Direct:
    • 1...2.3µs
  • Refresh:
    • 1µs
• Max I/O capacity:
  • 512 points
• Watchdog timer:
  • 10...2000ms
• Memory capacity:
  • 64kb
• Program capacity:
  • Main sequence:
    • 8000 steps
  • Sub sequence:
    • Unavailable
• Self-diagnostic functions:
  • Watchdog error monitor
  • Memory error detection
  • CPU error detection
  • I/O error detection
  • Battery error detection
• Clock function:
  • Year (Automatically recognizes leap years)
  • Month
  • Day
  • Hour
  • Minute
  • Second
• Allowable momentary power interruption time:
  • 20ms
• Current consumption:
  • 300mA
• Built-in inputs:
  • No
• Built-in outputs:
  • No
• Built-in communication ports:
  • RS-422
• Support of inner boards:
  • Yes
• Battery backup:
  • Yes (Depending upon unit battery may require changing)
• Programming language:
  • Language dedicated to sequence control. Relay symbol type and logic symbolic language MELSAP-II (SFC).
• Mounting:
  • Into Mitsubishi's Melsec-A A1S3 series backplane units (main base units)

Download Mitsubishi Melsec A series programmable logics user manual