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Ceiec Electric Technology
Chapter 4 Applications
4.1 Inputs and Outputs
4.1.1 Digital Inputs
The PMC-630E comes standard with six self-excited Digital Inputs that are internally wetted at 24 VDC.
Digital Inputs on the PMC-630E can be used in the following applications:
1)
Digital Inputs are typically used for monitoring external status which can help prevent equipment
damage, improve maintenance, and track security breaches. The real-time statuses of the
Digital Inputs are available on the front panel LCD Display as well as through communications.
Changes in Digital Input status are stored as events in the SOE Log in 1 ms resolution.
2)
Digital Inputs can be used for pulse counting to collect WAGES (Water, Air, Gas, Electricity and
Steam) information. The DI Pulse Counter information is available via communications. Pulse
Counters can be reset from the front panel or via communications.
There are 3 setup parameters:
DI Function
:
0 = Digital Input;
1 = Pulse Counter
DI Debounce
:
Between 0 and 1000 (ms). The default value is 20 (ms).
DI Pulse Weight
: Between 1 and 1,000,000 (x0.001). The default value is 1 (0.001).
4.1.2 Digital Outputs
The PMC-630E comes standard with three Form A Electromechanical Digital Outputs. Digital
Outputs are normally used for setpoint alarming, load control, or remote control applications.
Digital Outputs on the PMC-630E can be used in the following applications:
Front Panel Control:
Manually operated from the front panel. Please refer to the
DO SET
setup parameter in Section 3.2.3 for a detailed description.
Remote Control:
Remotely operated over communications via our free PMC Setup
software or the PecStar® iEMS.
Control Setpoint:
Control setpoints can be programmed to trigger RO, Data Recorder or
Waveform Recorder upon becoming active. Please refer to Section 4.4
for a detailed description.
Transient Setpoint:
Transient setpoint can be programmed to trigger RO, Data Recorder and
Waveform Recorder upon becoming active. Please refer to Section
4.6.3 for a detailed description.
Since there are so many ways to utilize the Digital Outputs on the PMC-630E, a prioritized scheme has
been developed to avoid conflicts between different applications. In general, Front Panel Control has
a higher priority and can override the other applications. Remote Control, Control Setpoints and
Transient Setpoint share the same priority, meaning that they can all be programmed to control the
same Digital Output. This scheme is equivalent to having an implicit Logical OR operation for the
