IMS 17 Operating Instructions Manual page 64

MNEMONIC
V
DESCRIPTION
The velocity variable is used in conjunction with the PR (print) instruction to read the current velocity of the axis in counts per
second. This variable can also be used with the BR and CL instructions to set a condition based upon a velocity. This variable can
also be used in conjunction with the user registers to compute another velocity.
USAGE
PR V
BR <addr>, V=<counts/sec>
CL <addr>, V=<counts/sec>
RELATED COMMANDS: VI, VM
MNEMONIC
VA
DESCRIPTION
The VA instruction allows the user to assign a 2 character name to a user defined variable.
The restrictions for this command are:
1] A variable cannot be named after a MDrive Motion Control Instruction, Variable or Flag.
2] The first character must be alpha, the second character may be alpha-numeric.
3] A variable is limited to two characters.
USAGE
VA <char><char>=<value>
EXAMPLE:
VA P2 'create user var P2
P2=20000 'set P2 to 20000
RELATED COMMANDS: UV
MNEMONIC
VI
DESCRIPTION
Initial velocity for all motion commands. The factory default value is 1000 clock pulses per second.
The initial velocity for a stepper should be set to avoid the low speed resonance frequency and must be set lower than the pull in
torque of the motor. It must also be set to a vaulue lower than VM (Max. Velocity).
USAGE
VI=<velocity>
EXAMPLE:
VI=2000 'set initial velocity to 2000 counts per second
RELATED COMMANDS: VM
FUNCTION
Read Only Velocity Variable
UNITS
Counts per Second
FUNCTION
Create User Variable Name
FUNCTION
Initial Velocity Variable
UNITS
Counts per sec
TYPE
Motion Variable
TYPE
Instruction
TYPE
Motion Variable
RANGE
1 to 5000000
DEFAULT
1000
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