Leadshine ELD2 Series - Pulse Input Interface

17
UserManualforELD2Servo
3.3.3 Pulse Input Interface
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Figure3‐6PulseInputInterfaceDifferentialDriveMode
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Figure3‐7PulseInputInterfaceSingleTerminalDriveMode
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(1) In order to transmit pulse data properly , we recommend using the differential drive mode.
(2) The differential drive mode, AM26LS31, MC3487 or similar RS422 line drive.
(3) Using of single-ended drive will cause reduction of the operation frequency.
(4) The user provide external power supply for single-ended drive. However, if current polarity connect
reversely, servo driver is damaged.
(5) The form of pulse input is the following form 3.7 below, while the arrows indicates the count .
Table3.7PulseInputForm
Pulsecommandform CCW CW Parametersettingvalue
Pulse symbol
Pulse + direction
The form of pulse input timing parameter is the following form 3.8 below. The 4 times pulse frequency
≤ 500kH if 2-phase input form is used.
Table3.8theparametersofpulseinputtimesequence
parameter Differential drive input Single-ended drive input
t
ck ＞ 2
μ
s ＞ 5
μ
s
t
h
＞ 1
μ
s ＞ 2.5
μ
s
t
l
＞ 1
μ
s ＞ 2.5
μ
s
t
rh
＜ 0.2μs ＜ 0.3μs
t
rl
＜ 0.2μs ＜ 0.3μs
t
s ＞ 1
μ
s ＞ 2.5
μ
s
t
q
ck ＞ 8
μ
s ＞ 10
μ
s