6.2 PG Interface Expansion Card
6-39
Chap. 6
CONTROL OPTIONS
(2) Pulse train input format selection (o13)
Set to reflect the pulse format that will be input to the A- and B-phases. Set to 0 when using a
master/slave connection.
(3) Command pulse compensation 1, 2 (o14, o15)
Position command data being input to the pulse train card can be changed with command pulse
compensation 1 and 2. This functionality can be used to change the ratio of the speeds of the master
motor and slave motor during synchronized operation.
4
2on compensati pulse Command
1on compensati pulse Command
source) external frominput pulse (Command pulse commandPosition
××=
α: Input format constant Command pulse/command code or run forward/run reverse pulse: α = 1
Two signals with a 90° phase difference: α = 4
[Example]
In synchronized operation with a master/slave connection with a slave that uses gears, assume that the
gear ratio is a:b and that the input pulse is transformed into b:a by command pulse compensation (b =
command pulse compensation 1; a = command pulse compensation 2).
4a
b
source) external frominput pulse (Command pulse commandPosition
××=
If the gear ratio is 1:3, the actual settings would be as follows:
Table 6.2.16
Command pulse
compensation 1
900 300 ・・・ 30 3
Command pulse
compensation 2
300 100 ・・・ 10 1
FRENIC-VG
PG
I/F
θ*
Pulse
command
Master
Slave
M
PE
FRENIC-VG
PGo
Card
PG
I/F
M
PE
Pulse
detection
θ
Synchronized
operation
Gear ratio a:b
(Speed ratio b:a)
Figure 6.2.32
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