LG Electronics 120S user manual Communication I/F Module ················· 4, Power Supply / CPU

4.4Communication I/F Module ················· 4 - 13

4.4.1Cnet I/F Module····························································································4 - 13

4.4.2Fnet I/F Module ····························································································4 - 13

4.4.3Pnet I/F Module ····························································································4 - 14

4.4.4DeviceNet I/F Module ····················································································4 - 14

4.5Option Module ····················· 4 - 14

Chapter 5. Power Supply / CPU

5.1Power Supply Specifications ················ 5 - 1

5.1.1Standard Type······························································································· 5 - 1

5.3.2Economic Type······························································································ 5 - 1

5.2CPU Specifications ···················· 5 - 2

5.2.1Standard Type······························································································· 5 - 2

5.2.2Economic Type······························································································ 5 - 4

5.3 Operation Processing ··················· 5 -6

5.3.1Operation Processing Method··········································································· 5 - 6

5.3.2Operation Processing at Momentary Power Failure Occurrence ······························· 5 - 7

5.3.3Scan Time···································································································· 5 - 8

5.3.4Scan Watchdog Timer····················································································· 5 - 8

5.3.5 Timer Processing ························································································· 5 - 9

5.3.6Counter Processing·······················································································5 - 12

5.4Program························································································ 5 - 14

5.4.1Classifications of Program ·············································································5 - 14

5.4.2Program Execution Procedure ·········································································5 - 14

5.4.3Interrupt Programs ························································································5 - 15

5.4.4Error Handling······························································································5 - 17

5.5Operation Modes ···················· 5 - 19

5.5.1RUN Mode ··································································································5 - 19

5.5.2STOP Mode·································································································5 - 20

5.5.3PAUSE Mode·······························································································5 - 20

5.5.4DEBUG Mode(Standard Type Only)··································································5 - 20

5.5.5Operation Mode Change ················································································5 - 21

5.6Function························ 5 - 23

5.6.1Self-diagnosis······························································································5 - 23

5.6.2I/O Force On/Off function ··············································································5 - 24

5.6.3Direct I/O Operation function ···········································································5 - 27

5.6.4System error history ······················································································5 - 27

5.7Memory Configuration ··················· 5 - 28

5.8I/O Address Allocation ··················· 5 - 29

5.9 Built-in Cnet Selection switch ··························································· 5 - 30

5.9.1 Structure·····································································································5 - 30