How do you configure a 4-20mA analog input on the ROC800?

In ROCLINK 800 → I/O Points → Analog Inputs: set Input Type to 4-20mA, enter Low EU and High EU for engineering unit scaling, assign Tag ID, and configure alarms.

What pulse input types does the ROC800 support?

Low-frequency (contact closure, ~50 Hz max) and high-frequency (magnetic pickup, several kHz). Select based on turbine meter output type.

How do you verify an analog input is reading correctly?

View live raw and EU values in Display → Analog Inputs. Compare against an independent reference instrument at the same process point.

How to Configure I/O on the Emerson ROC800

Quick Answer

Configure ROC800 I/O in ROCLINK 800 under I/O Points: select the channel, set input type (4-20mA, voltage), enter Low EU and High EU for scaling, assign a Tag ID, and configure alarm limits. Setting wire break detection at 3.8mA rather than 3.5mA catches failing transmitters earlier — most 4-20mA transmitters begin dropping below 4mA before complete circuit failure.

How Do You Configure an Analog Input?

Navigate to I/O Points → Analog Inputs
Select the AI point for the physical channel
Set Input Type (4-20mA, 1-5VDC, 0-10VDC)
Enter Low EU (value at 4mA) and High EU (value at 20mA)
Enter Tag ID
Set Alarm Low and Alarm High limits
Write configuration to device
Verify live value in Display → Analog Inputs

How Do You Configure a Pulse Input?

Navigate to I/O Points → Pulse Inputs
Set Input Type (low-frequency or high-frequency)
Enter K-Factor (pulses per unit volume)
Set Meter Factor (1.0000 initial)
Assign to AGA-7 meter run

For comparison, see IDEC FC6A analog I/O configuration and ROC analog input scaling.

Frequently Asked Questions