Вот сниф обмена между ПЛК и ПМ-01 в режиме CSD:

ATI

SIMCOM_Ltd
SIMCOM_SIM300D
Revision:1008B14SIM300D32_SST34HF3284

OK
ATZ

OK
ATE

ERROR
ATQ

ERROR
ATM

ERROR
ATS0=0

OK
ATS7=40

OK

RING
ATA

CONNECT 9600
:010300150001E6
:0106000801B13F
:0106000801B13F
:010300150001E6
:0103020000FA
:0106000701AF42
:0106000701AF42
:010300150001E6
:0103020000FA
:0106000601AE44
:0106000601AE44
:010300150001E6
:0103020000FA
:0106000500F8FC
:0106000500F8FC
:010300150001E6
:0103020000FA
:0106000400F8FD
:0106000400F8FD
:010300150001E6
:0103020000FA
:0106000300F9FD
:01:0106000300F9FD
0300150001E6
:0103020000FA
:010600020000F7
:010600020000F7
:010300150001E6
:0103020000FA
:010600010000F8
:010600010000F8
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:0103020000FA
:010600170A5F79
:010600170A5F79
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:010600130000E6
:010600130000E6
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:010600120042A5
:010600120042A5
:010300150001E6
:01005
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