2.6.2 Write Commands
These commands are sent by the client (PC / PLC) to the dispenser to change specific parameters or settings on the
dispenser. Write commands are sent using the sequence explained in “2.4.1 Write Text Packets” on page 46.
NOTE:
The two hyphens (
--
) shown in the commands represent ASCII space values (hex
0x20
).
2.6.2.1 Memory Change Command
This command changes the selected memory location of the dispenser. The LCD screen will update to the new
memory location, including updating the dispense time, pressure, and vacuum parameters.
Client command and data:
CH--ccc
ccc:
The 3-digit memory location from 0–399. The dispenser will automatically limit the value to prevent any errors.
EXAMPLE:
To change the Memory Location to 001, the text packet is:
(STX) + 07 + CH-- + 001 + 3D + (ETX)
The above text packet in hexadecimal format:
STX
0
7
C
H
Space Space
0
0
1
3
D
ETX
0x02
0x30
0x37
0x43
0x48
0x20
0x20
0x30
0x30
0x31
0x33
0x44
0x03
2.6.2.2 Timed Mode Command
This command switches the dispenser to the Timed mode.
Client command and data:
(STX) + 04 + TT-- + B4 + (ETX)
The above text packet in hexadecimal format:
STX
0
4
T
T
Space Space
B
4
ETX
0x02
0x30
0x34
0x54
0x54
0x20
0x20
0x42
0x34
0x03
2.6.2.3 Steady Mode Command
This command switches the dispenser to the Steady mode.
Client command and data:
(STX) + 04 + MT-- + BB + (ETX)
The above text packet in hexadecimal format:
STX
0
4
M
T
Space Space
B
B
ETX
0x02
0x30
0x34
0x4D
0x54
0x20
0x20
0x42
0x42
0x03
2.6.2.4 Time / Steady Toggle Command
This command toggles the dispenser between Timed mode and Steady mode.
Client command and data:
(STX) + 04 + TM-- + BB + (ETX)
The above text packet in hexadecimal format:
STX
0
4
T
M
Space Space
B
B
ETX
0x02
0x30
0x34
0x54
0x4D
0x20
0x20
0x42
0x42
0x03
Appendix B — RS‑232 Protocol (continued)
Ultimus V High Precision Fluid Dispenser
51
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