Command Quick Reference G-3
Microstep-Enabled Firmware Commands
Command Value Description
N <n> = 0 or 1 Sets the microstep mode off or on.
S <n> = 0..40 Sets speed
V <n> = 5..6000 Sets end velocity in HS/s
v <n> = 50..1000 Sets start velocity in HS/s
c <n> = 50..2700 Sets cutoff velocity in HS/s
L <n> = 1..20 Sets ramp slope
K <n> = 0..31 (default 11) Backlash
k <n> = 0..80 or 0..640 in microstep mode
Report Commands
Command Description
Q Query, Status and Error Bytes
? Reports absolute plunger position
?1 Reports start velocity
?2 Reports top velocity
?3 Reports cutoff velocity
?4 Reports actual position of plunger
?12 Reports number of backlash steps
?13 Reports status of input #1
?14 Reports status of input #2
?22 Reports current value from fluid sensor
F Reports buffer status
& Reports firmware version
# Reports firmware checksum
Error Codes
Command Description Notes
0 Error free condition
1 (01h) Initialization error Fatal error. Reinitialize pump before resuming normal operation.
2 (02h) Invalid command
3 (03h) Invalid operand
4 (04h) Invalid command sequence
6 (06h) EEPROM failure
7 (07h) Device not initialized
9 (09h) Plunger overload Fatal error. Reinitialize pump before resuming normal operation.
10 (0Ah) Valve overload Fatal error. Reinitialize pump before resuming normal operation.
11 (0Bh) Plunger move not allowed
15 (0Fh) Command overflow
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