Application Program For Data Reception Using A Combination That Specifies The Start Frame - Mitsubishi Electric MELSEC iQ-R Series User Manual

Application program for data reception using a combination that
specifies the start frame
The following shows the program example when receiving data using a combination that specifies the start frame.
Reception program example
Data reception using a user frame set with the following conditions is shown below.
■C24 interface used for communication with target device
CH1 side RS-232 interface of C24
■Parameter settings
For other than the following items, use default values.
Item
Word/byte units designation
Transparent code for receiving
specification
ASCII-BIN conversion designation
Receive end data quantity
Receive end code
User frame use enable/disable
designation
Start frame No. designation
*1
Final frame No. designation
User frame receiving method
designation
Method 1 dedicated receive end data
quantity designation
*1 It indicates the registered contents of the user frame No. specified to the start and final frame No., respectively.
■Registration contents in user frame
Item
Start frame No. 1st
2nd
3rd
4th
Final frame No. 1st
2nd
3rd
4th
■Program example
The following shows example of data reception with a user frame.
Category Label name
Module label C24_1
C24_1.stnCH1.bSet_Req_ReceptionRead
C24_1.stnCH1.bSts_ReceptionAbnormalDetection
C24_1.stnCH1.uResult_ReceiveUserFrame_D
Setting content Buffer memory address
to store registration value
Word/byte 150(96H)
Designated/No 288(120H)
designation
Do not convert 289(121H)
6 164 (A4H)
No designation 165 (A5H)
Use 173 (ADH)
Designated 174 to 177 (AEH to B5H)
Method 0/Method 1 8224 to 8227 (2020H to 2023H)
0H to FFFFH 8228 to 8231 (2024H to 2027H)
User frame No.
3E8H
3E9H
6H
15H
41BH/8005H
0H (none)
0H (none)
0H (none)
Remarks
Set to either one according to the program example.
When 'Designated', Additional code: 10H (DLE)
Transparent code: 02H (STX)



Refer to the illustrations provided in this section.
Registered code
02H, 51H, 20H, 0AH, 3BH
02H, 41H, 3BH
06H
15H
03H, FFH, F0H



Description
Target module
CH1 Reception data read request
CH1 Reception abnormal detection
CH1_Receive user frame (nth)
15 DATA COMMUNICATIONS USING USER FRAMES
15.3 Program for Data Reception with User Frame
Registered data content
STX, Q, (SP), Station No. of target
device, ;
STX, A, ;
ACK
NAK
ETX, Sum check code



Device

X3
X4
U0\G603
15
303