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Operation
Communication Setup
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4
2
LevelPRO User Manual
The default communication settings for the RS232 (Com A and Com B) ports of the
detector and for the Thermo Scientific EZ Cal II are:
–
Port Mode: Disabled
–
Unit ID:
1
–
Baud Rate: 9600
–
Parity:
None
–
Data Bits: 8
–
Stop Bits:
1
–
Modbus Protocol:
–
Floating Format:
1. Enable or disable the selected port.
2. When configuring an RS485 port, assign a unit identification number between 1
and 32.
3.
Select the appropriate baud rate from the dropdown list. The dropdown contains
options for 9600, 19200, 38400, 57600 and 115200. The higher the baud rate,
the faster the data transfer.
4. Select Even, Odd or None from the Parity dropdown.
5. Choose the appropriate number of data bits, either 7 or 8.
6. Select 1, 1.5 or 2 stop bits. For most communications, 1 stop bit should be
appropriate.
7. Port Mode:
a. For Com A, select from RS232, RS232 with RTS/CTS and UART Logic
Level.
b. For Com B, select fromRS232, RS232 with RTS/CTS, 2-Wire RS485 and 4-
Wire RS485.
8. Indicate ASCII or RTU as the proper Modbus Protocol.
9. Select the Floating Format, either Normal or Reversed. This selection determines
the order in which bytes and words will be sent.
10. The Rx Count, Tx Count and Error Count fields will auto-populate.
11. After selecting the appropriate parameters, click Submit to save the data, Refresh
to update the data throughout, or Cancel to exit Communication Setup without
saving.
12. Repeat steps 1 – 11 to configure the Com B port, if desired.
RTU
Normal
Thermo Scientific
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