Fuji Electric micrex-sx NP1F-MP1, Руководство пользователя

Страница: 160 / 250

6-3
6-2 Relationship between Parameters (Registers)
The time until maximum output frequency is reached since the NP1F-MP1/NP1F-MP2 has stopped pulse output (0Hz) is
calculated from the following formulas. (The minimum setting of acceleration/deceleration register is “1.” Do not set “0.” If
“0” is set, acceleration/deceleration time may not be calculated correctly.)
1) When the effective bit length of the frequency register is 20 bits
Acceleration/deceleration time (ms) = (2 20 - 1) / {25000kHz / (Set value of acceleration/deceleration re 1)}
Sample setting:
The acceleration/deceleration time when the minimum value is assigned to acceleration/deceleration register
becomes as follows:
Acceleration/deceleration time = (2
20 - 1) / (25000kHz / 2)
= (1048576 - 1) / (25000kHz / 2)
= 83.9ms
2) When the effective bit length of the frequency register is 16 bits
Acceleration/deceleration time (ms) = (2
16
- 1) / {25000kHz / (Set value of acceleration/deceleration re 1)}
Sample setting:
The acceleration/deceleration time when the minimum value is assigned to acceleration/deceleration register
becomes as follows:
Acceleration/deceleration time = (2 16 - 1) / (25000kHz / 2)
= (65536 - 1) / (25000kHz / 2)
= 5.2ms
Precaution:
· The minimum setting of the base frequency register is “1.” If “0” is set, the value is automatically rewritten to “1” by this
module. The setting of the target frequency register must be Target frequency register
≥
Base frequency register.
For details, refer to the paragraph for target frequency register.