Lika SMAX-AI1-PRG-L2, Руководство пользователя

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SMAX MODBUS®
5.5 Manual frame page – Transmitting PDUs manually
When you press the
MANUAL FRAME
button in the
FUNCTIONS
group box on
the top right of the main page of the interface, you enter the page that allows
you to enter and transmit Request PDUs manually. In the “Programming
examples” section on page 77 you can find some examples of Request PDU
messages and the relevant Response PDU messages.
If you need to enter and transmit a Request PDU manually proceed as follows:
1. enter the PDU message expressed in hexadecimal notation in the fields
under the
Transmit pattern
item; you can use the TAB key in the
keyboard to move through the fields under
Transmit pattern
;
2. enter the Cyclical Redundancy Check (CRC) value in the last two fields
on the right side;
3. if you select the
CRC auto
check box you will not be required to enter
the CRC value manually: CRC will be calculated automatically by the
program when the message is transmitted;
4. press the SEND button to transmit the Request PDU message.
In the field under the
Received pattern
item the Response PDU transmitted
back by the Server will appear in hexadecimal format.
If the system is unable to receive the Response PDU, the
No pattern
error
message appears next to the
Received pattern
field.
MAN SMAX MB E 1.2 Quick reference 42 of 84