LG GLOFA-GM Series User Manual page 267

Programmable logic controller cnet i/f module
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Chapter 8 Exercising program
Frame name is 'GM_RD_ACK'. Since RX frame has a data, enter CONST in segment 1 and allocate 20
bytes of data RX area in ARRAY to segment 2. As in ASCII communication, select Convert to convert
received ASCII data to HEX to allow receiving in figures.
Total screen of frame entry: Next is the basic screen of Frame Editor where 4 frames are registered
showing frames 0 ~ 3 are entered in frame list.
After frame edit above is finished, save the file and download the frame to Cnet I/F module to run RS-232C
channel for preparation of operation. TX sequence of 4 frames is as shown in [Figure 8.6]. User defined
program shall be prepared in GMWIN to allow TX/RX in order as in the figure.
[Figure 8.6] TX sequence of TX/RX frames
Write request TX(GM_WR)
Write rsponse(GM_WR_ACK)
Read request TX (GM_RD)
Read rsponse (GM_RD_ACK)
8-16

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