Communication Timeout; Rs-232 Commands; Response Commands; Success Command (A0) - Nordson EFD Ultimus V Manuel Utilisateur

Doseur de Fluide Haute Précision Ultimus V
Annexe B — Protocole RS-232 (suite)

2.5 Communication Timeout

To ensure that RS-232 packets do not compromise the operation of the LCD display, the Ultimus V dispenser has
a Communication Timeout safeguard. As soon as the dispenser receives an Enquiry (
responds with an acknowledgment (
next text packet(s). If no text packet is received within 2 seconds, the dispenser sends a Failure Command (
packet to the client and removes the communication hold. Any characters received by the dispenser will reset the
timeout. When a failure occurs, the client must restart the communication sequence by (1) sending an End of Text
( EOT / 0x04 ) and then (2) starting a new Write or Read sequence by sending an Enquiry (

2.6 RS-232 Commands

This section contains the RS-232 commands for the Ultimus V dispenser. Each sub-section includes a brief
description of the command, the command format with the text packet data attached to the command, and, if
necessary, the format of the return command along with its attached data.
These commands are contained in the Command part of the text packet, shown below:
NOTE: A hyphen (

2.6.1 Response Commands

These commands are used to communicate command success or failure between the client and the dispenser.

2.6.1.1 Success Command (A0)

This command is sent when a command is successfully executed.
Text packet structure: (STX) + 02 + A0 + 2D + (ETX)
The above text packet in hexadecimal format:
STX 0
0x02 0x30

2.6.1.2 Failure Command (A2)

This command is sent if a command fails to execute. This can be caused by an error in the text packet or if the
transmission was interrupted and timed out (if the client takes more than 2 seconds to send a text packet),
Text packet structure: (STX) + 02 + A2 + 2B + (ETX)
The above text packet in hexadecimal format:
STX 0
0x02 0x30
50
www.nordsonefd.com/fr EFDEU-South@nordson.com
ACK / 0x06
[STX] [No. Bytes] [Command] [Data] [Checksum] [ETX]
- ) represents an ASCII space value (hex
2 A 0 2
0x32 0x41 0x30 0x32
2 A 2 2
0x32 0x41 0x32 0x32
+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.
). The dispenser enters a communication-hold state and awaits the
0x20 ).
D ETX
0x44 0x03
B ETX
0x42 0x03
ENQ / 0x05 ) from the client, it
A2 ) text
ENQ / 0x05 ).