Nexen RSD100 964520 - Manual (Page 14)

FORM NO. L-21107-H-0108 1
The RSD100 needs to know what the machine is doing (i.e. starting, running and stopping). This is accomplished
through the Machine State signal input to the RSD100. Because many machines operate differently, the RSD100 was
designed to accommodate many different types of machine state signals. The following figure and descriptions detail
the many variations of machine state signals that the RSD100 accepts. After choosing the best one for the application,
the rotary switch on the RSD100 printed circuit board has to be set per Table 2.
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(6) Encoder
(Pulses)
(5) Start Only
(Momentary)
(4) Start / Stop
(Momentary)
(3) Run / Stop
(Maintained)
(2) Start / Stopped
(Momentary)
(1) Run / Stopped
(Maintained)
0%
100%
Machine Speed
Pulse Time (t) must be > + 100ms -t-
Time
Machine State
Figure 9a
1. Run / Stopped Signal (Maintained)
When the Run/Stopped signal is low, the RSD100 OUTPUT will hold at the STOPPED OUTPUT %. When the
Run/Stopped signal transitions from low to high the RSD100 will begin controlling and the RSD100 PROPOR-
TIONAL gain value will be multiplied by the PROPORTIONAL MULTIPLIER. The duration of the PROPOR-
TIONAL MULTIPLIER is set with the START DURATION parameter. After the machine state signal goes low, the
OUTPUT will change to the STOPPED OUTPUT % at the rate set by the STOPPED BLEED RATE.
. Start / Stopped (Momentary)
Before the Start/Stopped pulse, the RSD100 OUTPUT will hold at the STOPPED OUTPUT %. When the Start
pulse is detected, the RSD100 will begin controlling and the RSD100 PROPORTIONAL gain will be multiplied
by the PROPORTIONAL MULTIPLIER. The duration of the PROPORTIONAL MULTIPLIER is set with the START
DURATION parameter. When the stopped pulse is detected again, the OUTPUT will change to the STOPPED
OUTPUT % at the rate set by the STOPPED BLEED RATE.
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