MOTOR_OUT (147)
MOTOR_OUT (147)
ID 147
|
Application: |
PLC |
Group: MOTION
Short description:
Function that transmits signal of the set speed of the servo drive to the analog output.
Inputs (1):
|
no. |
type |
impulse |
mark |
notes |
|
1 |
R |
no |
IN |
Set value of the motor rotary speed |
Outputs: none
Settings:
|
no. |
type |
mark |
notes |
|
1 |
I |
AO_number |
Analog output number 1...4 |
| 2 | R | n_max | Max value of the rotary speed [rpm] |
| 3 | I | min_limit | Upper limit of the analog output register value (0...4095) |
| 4 | I | max_limit | Lower limit of the analog output register value (0...4095) |
| 5 | I | offset | Moving the register value up or down (-2046...2046) |
| 6 | I | enc_res | Motor encoder resolution [imp/r] |
Function operation:
The MOTOR_OUT function transfers the motor speed control signal to the analog output selected by the AO_number parameter. At the bottom of the block, the number of the currently assigned analog output is displayed. The resolution of the analog output is 12 bits. The voltage range on the analog output is +/- 10 [V]. The value of the analog signal is set by means of the appropriate register in the range 0 ... 4095. A value of 0 corresponds to approximately -10V and a value of 4095 corresponds to approximately 10V. The value of 2047 is approximately 0V. The analog signal may slightly deviate from the zero value with the register value equal to 2047, therefore, to compensate for this effect, you can change the offset in the block settings. The maximum value of motor revolutions is expressed in [rpm].
Special registers assigned to the analog outputs:
|
Output mark |
AO_number |
Voltage range | Resolution |
Special registry number |
Special registry name | Range of special registers values |
|
AO1 |
1 |
-10[V]...+10[V] |
12 bitów |
R3421 |
_Analog_OUT1 | 0...4095 |
| AO2 | 2 | -10[V]...+10[V] | 12 bitów | R3422 | _Analog_OUT2 | 0...4095 |
| AO3 | 3 | -10[V]...+10[V] | 12 bitów | R3423 | _Analog_OUT3 | 0...4095 |
| AO4 | 4 | -10[V]...+10[V] | 12 bitów | R3424 | _Analog_OUT4 | 0...4095 |
The function block calculates the rotary speed value according to the formula:
R[3420 + AO_number] = {(60 * 2047 * IN) / (n_max * enc_res)} + 2047 + Offset
Graphic interpretation of the MOTOR_OUT function operation:
R registers and M markers used:
|
no. |
name |
description |
R - read, W - write |
|
R3421 |
_Analog_OUT1 |
analog output no. 1 (0...4095) |
W |
| R3422 | _Analog_OUT2 | analog output no. 2 (0...4095) | W |