Plc Function Specifications - Mitsubishi Electric A800 Programming Manual

PLC function specifications

1.4

PLC function specifications

The following table shows the program capacity and devices of the PLC function.
Control method
I/O control mode
Programming language
Sequence instructions
No. of
Basic instructions
instructions
Application instructions
Processing speed
Number of I/O device points
Number of analog I/O points
Pulse train I/O
Watchdog timer
Program capacity
Internal relay (M)
Latch relay (L)
Timer (T)
Device
Counter (C)
Data register (D)
Special relay (SM)
Special register (SD)

The scan time is approximately 40 ms for 1K steps as inverter control is also performed in actual operations.

The signals same as the ones assigned to the inverter I/O terminals are used.
One point is always required for a sequence start (RUN/STOP).

The Pr.291 Pulse train I/O selection setting is required. The pulse train output is only available for the FM type inverter.

There is no device latch function for power failures.
Use the Pr.1150 to Pr.1199 PLC function user parameters 1 to 50 (D206 to D255) to store device values in the EEPROM. (Refer to
NOTE
• There is no buffer memory.
10
PLC Function
Item
Input
Output
Number of points
Specifications
Number of points
Specifications
A800/F800 PLC function specifications
Repeated operation (by stored program)
Refresh
Relay symbolic language (ladder)
Function block
25
84
37
Sequence instructions 1.9 μs to 12 μs/step
128 (input: 64 points, output: 64 points)
19 points built-in (input: 12 points, output: 7 points)
FR-A8AX (input: 16 points)
FR-A8AY (output: 6 points)
FR-A8AR (output: 3 points)
3 input points built-in (Terminals 1, 2, and 4), FR-A8AZ: 1 input point
(Terminal 6)
2 output points built-in (Terminals F/C(FM/CA) and AM), FR-A8AY: 2
output points (Terminals AM0 and AM1), FR-A8AZ: 1 output point
(Terminal DA1)
Terminal JOG (maximum input pulse: 100k pulses/s)
Terminal FM (maximum output pulse: 50k pulses/s)
10 to 2000 ms
6K steps (24k bytes) (0 to 6144 steps can be set), contained in one
program
128 (M0 to M127)
Not used (Can be set with parameters but will not latch)
16 (T0 to T15)
100 ms timer: 0.1 to 3276.7 s can be set
10 ms timer: 0.01 to 327.67 s can be set
100 ms retentive timer: 0.1 to 3276.7 s can be set
16 (C0 to C15)
Normal counter: Setting range 1 to 32767
Interrupt program counter: Not used
256 (D0 to D255)
2048 (SM0 to SM2047) with limited functions
2048 (SD0 to SD2047) with limited functions





page 49.)