Table Of Contents - Mitsubishi Electric MELSEC-A Series User Manual

1
CONTENTS
INTRODUCTION •...••...•••••....••.•••••••••••....•••••.••••••••••••• 1-1 -1-11
1.1 General Description of Operation 1-2
1.1.1 ON/OFF data communication between the A2C and the remote I/O module • . . . .. 1 - 2
1.1.2 Data communication between the A2CCPU and the remote terminal module ..... 1 - 4
1.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 - 5
1.3 General Terms and Abbreviations 1 - 9
1.4 Reference Manuals .........................................................• 1 - 11
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2 SYSTEM CONFIGURATION 2-1 -2-16
2.1 Overall Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
2.2 Notes on System Construction 2 - 3
2.3 System Equipment 2 - 8
4
2.3.1 Modules which can be connected to the A2CCPU 2 - 8
2.3.2 Peripheral devices 2 - 15
3 GENERAL SPECIFICATIONS 3-1
4 A2CCPU ••••••...••••....••••••••••••..••....••••••.•...••••...••••. 4-1 - 4-94
4.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . .. 4 - 1
4.1.1 Repeated operation processing 4 - 4
4.1.2
In~ial
processing 4 - 4
4.1.3 END processing 4 - 5
4.1.4 Timer processing and accuracy 4 - 6
4.1.5 Counter processing and maximum counting speed 4 - 8
4.1.6 Operation processing at momentary power failure 4 - 9
4.1.7 Scan time 4 -10
4.1.8 Watch dog timer (WDl) 4 - 11
4.1.9 RUN. STOP. PAUSE operation processing 4-13
4.2 Functions 4 - 18
4.2.1 Constant scan 4 - 19
4.2.2
Power failure compensation for device data in the A2C
(LATCH function) 4 - 22
4.2.3 Running and stopping the A2C from external devices
(Remote RUN/STOP function) 4 - 24
4.2.4 Stopping the sequence program operation retaining outputs (PAUSE function) .. 4 - 26
4.2.5 Status latch .......................................................•.. 4 - 28
4.2.6 Sampling trace 4 - 30
4.2.7 Offline
sw~ch
function 4 - 33
4.2.8 Setting priority for ERROR LED indication 4 - 35
4.2.9 Control functions of remote I/O modules and remote terminal modules 4 - 37
4.2.10 Output from the ERR terminals 4 - 41
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