Nordson EFD Ultimus V Manuel Utilisateur page 47

Annexe B — Protocole RS-232 (suite)
2.4.1 Write Text Packets (continued)
If there is an error in the text packet, if it cannot be executed, or if the transmission was interrupted and timed
out (if the client takes more than 2 seconds to send a text packet), the dispenser transmits a Failure Command
( A2 ) text packet. Refer to "1.1 RS-232 Pin Assignments" on page 39 for details.
EXAMPLE:
(STX) + 02 + A2 + 2B + (ETX)
The above text packet in hexadecimal format is shown below:
STX 0
0x02 0x30
If the client receives an Failure Command (
the client can transmit an End of Text (
Diagram of Write Text Packet Communication between the Client and Dispenser
ENQ (0x05)
STX
Client
(0x02)
(PC / PLC)
EOT (0x04)
NOTES:
• The STX ( 0x02 ) and
NAK ( 0x15 ), or EOT
• Communication Timeout: The client sends an Enquiry (
acknowledgment ( ACK
previously) must be sent by the client within 2 seconds, otherwise the dispenser enters a Communication Timeout
state and responds with an Failure Command (
www.nordsonefd.com/fr EFDEU-South@nordson.com
2 A 2 2
0x32 0x41 0x32 0x32
A2 ) text packet, the client can either transmit another text packet or
EOT / 0x04
Communication Flow
Space Space
0 8 P S
(0x20) (0x20)
) control characters are not added when sending
ETX ( 0x03
( 0x04 ). These are stand-alone / single-byte control characters.
/ 0x06 ) in response. The next text packet (such as the
A2
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B ETX
0x42 0x03
) command to end the sequence.
0 5 0 0 F
STX
0 2 A
(0x02)
ENQ / 0x05 ) to the dispenser and receives an
) text packet.
ACK (0x06)
ETX
0 Ultimus V
(0x03)
dispenser
ETX
0 2 D
(0x03)
ENQ ( 0x05 ), ACK ( 0x06
PS--0500 text packet shown
),
47