Mitsubishi Electric MELSEC FX Series - Page 13

FX communication
xi
8. Commands.............................................................................................. 8-1
8.1 Batch Read of Bit Device (BR command)..............................................................8-2
8.2 Batch Read of Word Device (WR command) ........................................................8-3
8.3 Batch Write of Bit Device (BW command).............................................................8-5
8.4 Batch Write of Word Device (WW command)........................................................8-6
8.5 Test of Bit Device (BT command)..........................................................................8-8
8.6 Test of Word Device (WT command) ....................................................................8-9
8.7 Remote RUN/STOP (RR, RS commands) ..........................................................8-10
8.7.1 Operation of Remote RUN/STOP...........................................................................................8-10
8.7.2 Conditions for Valid Execution of Remote RUN/STOP........................................................... 8-10
8.7.3 Control Specification and Examples of Remote RUN/STOP..................................................8-11
8.8 Reading The Programmable Controller Type (PC command).............................8-12
8.8.1 Type Codes ............................................................................................................................8-12
8.8.2 Control Specification and Example.........................................................................................8-13
8.9 Global Function (GW command) .........................................................................8-14
8.9.1 Control Specification and Example of Global Function........................................................... 8-14
8.10 On-demand Function.........................................................................................8-15
8.10.1 Special Devices Used in On-demand Function .................................................................... 8-15
8.10.2 On-demand Control Protocol ................................................................................................8-16
8.10.3 Specification and Example of On-demand............................................................................8-18
8.11 Loopback Test ...................................................................................................8-21
9. RS instruction.......................................................................................... 9-1
9.1 Function and Operation .........................................................................................9-1
9.1.1 Send and Receive Program......................................................................................................9-1
9.1.2 Operation of RS Instruction.......................................................................................................9-3
9.1.3 Related Flags and Data Registers............................................................................................9-4
9.2 Hardware Hand Shake Operation..........................................................................9-6
9.2.1 FX, FX
2C
, FX
0N,
FX
1S
, FX
1N
and FX
2N
(earlier than V 2.00)....................................................9-6
9.2.2 FX
2N
, FX
2NC
(V 2.00 or later) .................................................................................................9-10
9.3 Number of Communication Data .........................................................................9-13
9.3.1 Deal with 16 bits Data.............................................................................................................9-13
9.3.2 Deal with 8 bits Data............................................................................................................... 9-14
9.4 Example Program................................................................................................9-15
9.4.1 Personal Computer.................................................................................................................9-15
9.4.2 Printer .....................................................................................................................................9-17
10. FX
2N
-232IF..........................................................................................10-1
10.1 Introduction........................................................................................................10-1
10.1.1 Outline of Product .................................................................................................................10-1
10.2 Allocation of Buffer Memories (BFM’s) ..............................................................10-2
10.2.1 BFM List ...............................................................................................................................10-2
10.2.2 Communication Format <BFM#0> .......................................................................................10-4
10.2.3 Command
〈
BFM #1
〉 .................................................................................................. 10−8
10.2.4 Receive Upper Limit Byte Count
〈
BFM #2
〉 ................................................................... 10−9
10.2.5 Receive Time-out Time <BFM #3>.......................................................................................10-9
10.2.6 Send Header <BFM #5 (upper), BFM #4 (lower)>................................................................10-9
10.2.7 Send Terminator <BFM #7 (upper), BFM #6 (lower)> ..........................................................10-9
10.2.8 Receive Header <BFM #9 (upper), BFM #8 (lower)> ......................................................... 10-10
10.2.9 Receive Terminator <BFM #11 (upper), BFM #10 (lower)>................................................ 10-10
10.2.10 Receive Suspension Waiting Time <BFM #12> ...............................................................10-10
10.2.11 Number of Remaining Send Data <BFM #13> .................................................................10-11
10.2.12 Number of Receive Buffers <BFM #14> ........................................................................... 10-11