Lika EM58 MB, Руководство пользователя

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ES58 • EM58 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 to
enter and transmit Request PDUs manually. In the “Programming examples”
section on page 85 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
group box; 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 ESx58x_EMx58x MB E 1.3 Quick reference 48 of 92