A - 8 A - 8
3.1.2 Coaxial cable system performance specifications..........................................................................3- 2
3.1.3 Optical fiber cable specifications .....................................................................................................3- 3
3.1.4 Coaxial cable specifications.............................................................................................................3- 4
3.2 Function Specifications...........................................................................................................................3- 7
3.2.1 Cyclic transmission function (Periodic communication).................................................................. 3- 8
(1) Communicating with input/output module....................................................................................... 3- 8
(2) Communicating with intelligent function module.............................................................................3- 9
3.2.2 RAS functions...................................................................................................................................3-14
(1) Output reset function for communication errors .............................................................................3-14
(2) Automatic return function.................................................................................................................3-14
(3) Loopback function (Optical loop system)........................................................................................3-15
(4) Station detach function (Coaxial bus systems)...............................................................................3-17
(5) Transient transmission enabled even at CPU module error ..........................................................3-18
(6) Checking the transient transmission abnormal direction time........................................................3-19
(7) Diagnostic functions.........................................................................................................................3-20
(8) Configuration of a redundant power supply on a remote I/O station .............................................3-21
(9) Online module change in a remote I/O station ............................................................................... 3-24
3.3 Link Data Send/Receive Processing Time Specifications.....................................................................3-30
3.3.1 Link data send/receive processing..................................................................................................3-30
3.3.2 Transmission delay time..................................................................................................................3-33
3.3.3 Switching time from the multiplexed remote master station to the multiplexed remote
sub-master station in a multiplexed remote I/O network................................................................3-46
3.3.4 Output holding time during system switching in the multiplexed remote I/O network for
redundant system............................................................................................................................3-47
4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION 4- 1 to 4-28
4.1 Procedures Before Starting the Operation.............................................................................................4- 1
4.2 Network Module Names and Settings....................................................................................................4- 2
4.2.1 QJ71LP21, QJ71LP21-25, QJ71LP21G, QJ71LP21GE, QJ71BR11 (Remote master station)...4- 2
4.2.2 QJ72LP25-25, QJ72LP25G, QJ72LP25GE, QJ72BR15 ...............................................................4- 5
4.3 Installing and Uninstalling the Module....................................................................................................4- 7
4.4 Stopping the CPU (Unintentional Output Prevention) ...........................................................................4- 9
4.5 Checking the Input Power Supply Voltage............................................................................................. 4- 9
4.6 Powering On............................................................................................................................................ 4- 9
4.6.1 Checking the on status of the POWER LED of the power supply module .................................... 4- 9
4.6.2 Checking the on status of the RUN LED of the network module ...................................................4- 9
4.7 Standalone Check of the Network Module (Offline Tests) ....................................................................4-10
4.7.1 Self-loopback test.............................................................................................................................4-11
4.7.2 Internal self-loopback test................................................................................................................4-12
4.7.3 Hardware test...................................................................................................................................4-13
4.8 Cable Connections..................................................................................................................................4-14
4.8.1 Optical loop system..........................................................................................................................4-14
4.8.2 Coaxial bus system..........................................................................................................................4-16
4.9 Offline Tests from GX Developer............................................................................................................ 4-21
4.9.1 Forward loop/reverse loop test (Remote master station only)........................................................4-21
4.10 Network Diagnostics from GX Developer (Online Tests) .................................................................... 4-24
4.10.1 Loop test (optical loop system only)..............................................................................................4-25
4.10.2 Setup confirmation test ..................................................................................................................4-26
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