IDEC High Performance Series - Manual (Page 174)

5 User Communication
3-72 WindO/I-NV2 User’s Manual
■ Receive command: Command Settings dialog box settings
Operation for receive command
1 Change the trigger condition LM202 from 0 to 1 to be ready for receiving user communication.
2 Data is transmitted from the external device and the transmitted data is received and processed.
The receive data is as follows.
• The receive data is compared with the character data, and the value of the matching Index No. (10 (DEC)) is stored
in Index Device LDR230.
• The 2 bytes (specified with Skip) of the receive command data 43h and 44h are ignored.
• Since the Reference Device LDR 230 of Device of the receive command data is 10 (DEC), the data is stored in the
device LDR250 and LDR251, which is offset by +10.
• [STX] ABCD1234 is calculated with BCC of receive command data and compared with 3032h.
- When Calculation Start Position is 1 and Calculation End Position is 0: Calculates the range STX ABCD1234.
- The BCC calculation type is XOR.
02h^41h^42h^43h^44h^31h^32h^33h^34h^=02h
Item Setting
Comment RXD command
Command Type Receive
Completed Device LM203
Not Clear Completed Device
automatically
No
Status Device LDR260
Receiving Time Out 0 (No Receive Time Out)
Trigger Condition While ON, Device: LM202
Command
Data Settings dialog box
settings
Constant
(Hexadecimal)
'02'
Registering
Constant
(Character)
10: "AB", 20: "CD", Index Device: LDR230
Skip 2 bytes
Device
Conversion Type: No Conversion, from Upper byte,
Number of bytes: 2, Words: 2
Device: LDR240, Reference Device: LDR230
BCC
Calculation Start Position: 1 Calculation End Position: 0, XOR
Binary (HEX) to ASCII, 2 bytes
Constant
(Hexadecimal)
'0D''0A'
3
(33h)
4
(34h)
1
(31h)
STX
(02h)
2
(32h)
A
(41h)
B
(42h)
C
(43h)
D
(44h)
Skip
CR
(0Dh)
LF
(0Ah)
0
(30h)
2
(32h)
BCC
Constant
(HEX) Device
Constant
(HEX)
Command settings:
Registering
Constant (Character)
Receive data:
Received data
Compare
A
(41h)
B
(42h)
Order of reception
10 LDR230:
Value of the Index Device
AB 10:
CD 20:
Data Index No.
Number of
Registering
Constants: 2
(DEC)
0000h LDR240:
0000h LDR241:
3132h LDR250:
Value of Device
LDR230=10
(1) (2) (3) (4) (5) (6) (7) (8) (9) Calculation Start Position:
(5) (4) (3) (8) (7) (6) (2) (1) (0) Calculation End Position:
3
(33h)
4
(34h)
1
(31h)
STX
(02h)
2
(32h)
A
(41h)
B
(42h)
C
(43h)
D
(44h)
CR
(0Dh)
LF
(0Ah)
0
(30h)
2
(32h)
Data used for BCC calculation