Etel DSC2P - Time Quantities Units

ETEL Doc. - Operation & Software Manual # DSC2P 903 / Ver. F / 3/6/05 Chapter E: Appendixes
Operation & Software Manual
Direct Drives & Systems 363
20.3 Time quantities units
Some parameters and commands are time-related. The formulae which calculates the time in ISO unit from
the time in increments are given below.
In the next part of the chapter, the time units will be abbreviated as follows and the conversion formulae given
from case to case.
Abbreviation used in the table below: h = Slow time interrupt [s] (refer to §4.1
for more information).
k = Fast time interrupt [s] (refer to §4.2
for more information).
m = Current time interrupt[s] (refer to §4.3
for more information).
[toi]
Torque
increment
(rotary motors)
[N · m] → [foi]
[foi] → [N · m]
•K60
• M30 to M32
Notation Signification Equivalent in SI Unit
[sti] Slow time increment [s]
[fti] Fast time increment [s]
[cti] Current loop time increment [s]
Unit Quantity Conversion formulae
Concerned
quantities
[sti]
Time
Slow
time
increment
[sti] → [s]
[s] → [sti]
• K38, K164,
K229
• LTI (K204)
• WTT
• JRT (K213)
[fti]
Time
Fast
time
increment
[fti] → [s]
[s] → [fti]
-
[cti]
Time
Current loop
time
increment
[cti] → [s]
[s] → [cti]
-
Unit Quantity Conversion formulae
Concerned
quantities
Torque [toi] Torque N[ m ]
32768
K
t
I
max, controller
⋅
-----------------------------------------
⋅⋅=
Torque N[ m ]⋅ Torque [toi]
K
t
I
max, controller
⋅
32768
-----------------------------------------
⋅=
Time [sti]
Time [s]
h
----------------------
=
Time [s] Time [sti] h⋅=
Time [fti]
Time [s]
k
----------------------
=
Time [s] Time [fti] k⋅=
Time [cti]
Time [s]
m
----------------------
=
Time [s] Time [cti] m⋅=
Controller resolution [m/s]⇒
PCod
256 1024 2
K77
k⋅⋅⋅
------------------------------------------------
=
Controller resolution [m/s]⇒
PCod
256 64 2
K69
k⋅⋅ ⋅
------------------------------------------
=
(for analog encoder)
(for TTL encoder)