Rate Control Function - Mitsubishi MELSEC-Q series User Manual

3
SPECIFICATIONS
3.2.4
(1) The increase and decrease in analog output values per 6ms
(2) To use this function, the following settings are required for each setting.
(3) Although values on a per-6ms basis are set in CH
Digital input value
Increase/derease
digital limit value
(100)
3
- 16 3.2 Function List

3.2.4 Rate control function

Rate control function
can prevent rapid change of the values.
*1 6ms is the D/A conversion cycle per channel.
• Enable the rate control function: rate control enable/disable setting (Un\G46)
• Set the increase/decrease of analog output value per 6ms: CH
decrease digital limit value (Un\G70 to Un\G81)
value (Un\G70 to Un\G81), the actual cycle in which the Q66DA-G updates analog
values is (6ms x number of conversion-enabled channels).
Therefore, the maximum increase/decrease in analog output values under the rate
control is a D/A converted value of (Increase/decrease digital limit value x No. of con-
version-enabled channels).
[Example Control of channel 3 when No. of conversion-enabled channels is 1 to 3]
• Output range: -10 to 10V
• Increase digital limit value: 100
• Decrease digital limit value: 100
1500
0
0 18 36 54
Update cycles of
6ms analog output value (18ms)
When the digital input value changes, the analog output value increases or decreases
in update cycles as follows:
1st time: D/A converted value of the upper/lower digital limit value
2nd time or later: D/A converted value of (Increase/decrease digital limit value x No.
of conversion-enabled channels)
60 78 96 114 132
time(ms)
*1
can be limited, which
increase/
increase/decrease digital limit
Digital input value
Analog output value
Voltage of analog
output value (mV)
937.5
150 168 186 204
0.0