
Chapter Six: Remote Digital Logic Control
How To Activate the Softstart Rate
117
How To Activate the Softstart Rate
When using the front panel controls or RS-232 to Open the valve, Close the valve, or use a
setpoint, the softstart rate is automatically activated. Having a softstart rate setting of 100% is the
same as not applying any softstart rate.
The following section applies to the use of TTL commands to Open the valve, Close the valve,
or use a setpoint.
The softstart rate for the active set point is controlled by the state of digital logic input pin 7 on
the Interface connector. This line must be held low to activate the softstart rate.
To activate softstart control of the active set point:
1. Hold the softstart line low (pin 7 on the Interface connector).
Refer to Table 8, for the Interface connector pinout. Hold the TTL low signal for a
minimum of 50 milliseconds. If the line is
not
held low, the valve will move at 100%
full speed.
Содержание 651D Series
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