Text Packet Example - Nordson EFD Ultimus V Manuel Utilisateur

Annexe B — Protocole RS-232 (suite)

2.3.7 Text Packet Example

The following is a visual example of a text packet. This example uses the Pressure Set Command (
send a 50.0 psi value to the dispenser.
NOTE: The two hyphens (
The text packet:
Start of Text
No. Bytes
The text packet in hexadecimal format:
STX 0 8
0x02 0x30 0x38
Checksum calculation example based on the above text packet:
0 - 0x30 - 0x38 - 0x50 - 0x53 - 0x20 - 0x20 - 0x30 - 0x35 - 0x30 - 0x30
= 0xFDF0
The least significant byte of the above value is
The End of Text control character (
www.nordsonefd.com/fr EFDEU-South@nordson.com
-- ) in the Pressure Set Command are used to denote two spaces (hex
Bytes Used for Checksum
Bytes Used for No. Bytes
Command Data
Bytes used to calculate
the Checksum
P S space space
0x50 0x53 0x20 0x20
F0 , so this value is appended to the text packet after the Data bytes.
ETX / 0x03 ) is appended.
+33 (0) 1 30 82 68 69 Les services et les points de vente des systèmes de dosage Nordson EFD sont présents dans le monde entier.
Doseur de Fluide Haute Précision Ultimus V
Checksum End of Text
0 5 0 0
0x30 0x35 0x30 0x30
PS--0500 ) to
0x20 ).
Checksum
appended
F 0 ETX
0x46 0x30 0x03
45