Installation, Operation and Maintenance Manual
MAN-02-10-93-0700-EN Rev. 0
May 2019
19
Section 6: Field Setup Using MPA Config Software
Field Setup Using MPA Config Software
6.8
Control Screen
The control screen (see Figure 14) is a valuable tool for commissioning the system.
All functions of the system may be tested prior to commissioning with the DCS. This screen
may be used to troubleshoot any problems should they occur. Field diagnostic
messages are displayed in the “Field Diagnostics Information” box. All active alarms may
be viewed at a glance in the “Alarms” section of the Control Screen.
Figure 14
1.
“Mode” displays the mode selected by the selector switch of the LDM or
combined logic of both LDM and RDM selector switches.
2.
“Status” displays Running or Stop state of the actuator.
3.
“At Port” displays the port number position of the actuator and whether the MPA
is at the port within 1 degree or within 2 degrees.
4.
“Torque” is displayed as percentage of the full torque rating of the actuator. Torque
is displayed from 10% to 99% in 1% increments. Torque less than 10% is displayed
as zero because torque between 0% and 10% cannot be accurately measured.
5.
“Encoder Value” is the 12-bit raw data from the position encoder in the range of
0 to 4095. This value is also displayed on the Factory Setup screen so it can be
compared to port calibration value of each port.
6.
“Valve Control” allows commanding the actuator to go to the next port or go to a
desired port number. “Go to Port” is the new setpoint in the range of 0 to 7. “Current
Setpoint” is the last commanded value stored in the actuator. Each time the actuator
is powered up or it torques out while moving, it loads an invalid setpoint of
255 to the “Current Setpoint”. This prevents the actuator from moving until a valid
setpoint from 0 to 7 is entered in the “Go to Port” and sent to the actuator. If “Next
Port” button is clicked while 255 is in the “Current Setpoint”, then the next higher
port number from the current position will be loaded to the current setpoint.