Pulsafeeder Pulsar DLC XP RC - Manual (Page 33)

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7.1.3 Reverse Acting Analog Input Signal Calibration
To set up a reverse acting application, follow the above Analog Input Calibration procedure with the
following changes to step 3 and 4:
1. In step 3, when the display requests the minimum analog signal value (0%), the user should send the
DLC – XP the high analog signal value (20 mA, 10 mA or 5 volts).
INPUT ANALOG MIN
0% = XX mA
Send High
(20mA) Signal
The DLC – XP will digitally store this as the 0% analog input signal value. As the analog signal
varies, the DLC – XP will display the fluctuating values. Wait for the signal to stabilize. Press
[ENTER] to accept this as the 0% analog signal value.
2. In step 4, when the display requests the maximum analog signal value (100%), the user sends the
DLC – XP the low analog signal value (0 mA, 4 mA, 1 mA or 1 volt).
INPUT ANALOG MIN
1000% = XX mA
Send Low
(4mA) Signal
The DLC – XP will digitally store this as the 100% analog input signal value. As the signal varies,
the fluctuating values are displayed. Wait for the signal to stabilize. Press [ENTER] to accept this
signal as the 100% analog signal value.
You can confirm the reverse calibration by re-entering the Analog Input Calibration menu. The first
screen summarizes your calibration.
7.1.4 Analog Output Signal Calibration
The DLC – XP will generate an analog output signal proportional to the current stroke setting. The
signal can be in the range of 0-20 mA, 4-20 mA, 1-5 mA, or 1-5 volts. It should be calibrated to the
attached system.
1. Press the [CAL] key to enter the {CALIBRATE} sub-menu. Press the [UP] arrow to scroll to the
ANALOG OUTPUT selection:
CALIBRATE
ANALOG OUTPUT
2. Press [ENTER]. The screen that allows you to set the output at 0% is displayed.
OUTPUT AT 0%
4.0 mA
Using [UP] and [DOWN], set the value for the desired output. Keep in mind that the value that you
set is for reference only.
If you need a true 4.0 mA at the remote equipment, you should read the actual value from the remote
equipment and set the value here at what ever is required by that equipment. For example, say a
remote PLC needs exactly 4.0mA's at 0% stroke. The PLC currently reads its input as 3.8mA and
the DLC – XP reads its output as 4.0mA. Increase the DLC – XP output (e.g., 4.2) until the PLC
reads correctly.
3. Once you have set the value press [ENTER] to accept. The screen that allows you to set the output at
100% is displayed.
OUTPUT AT 100%
20.0 mA
As described in step 2, set the output using [UP] and [DOWN]. When you are satisfied with your
settings press [ENTER] to accept.