Flowserve MX-100 Field Unit - Manual (Page 57)

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MX/DDC-100 Field Unit Installation and Maintenance FCD LMENIM2329-01 – 03/11
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Scaling chosen through LCS “CHANGE DDC?” subroutine “ANALOG SCALE 0-100-OK?” provides information for
diagnostic purposes, and will alter values displayed in registers 3, 4, 6, 7, 8.
Register 8
Continuous position feedback. Read-only. 16-bit unsigned value. Default scale is 0-100 increments of open. May be
adjusted to different scaling of 0-255 or 0-4095.
Scaling chosen through LCS “CHANGE DDC?” subroutine “ANALOG SCALE 0-100-OK?” will alter values displayed in
registers 3, 4, 6, 7, 8.
Register 9
Status register. Read-only. 16-bit unsigned value. Contains most desired indications of field unit status. This register
is a MUST in controlling a field unit.
Bit 00 Open – Valve is fully opened. This bit is ORd with bits 01, 02, 03, 04. Value of 1=True, Value of 0=False.
Bit 01 Close – Valve is fully closed. This bit is ORd with bits 00, 02, 03, 04. Value of 1=True, Value of 0=False.
Bit 02 Stopped in Mid-Travel - Valve stopped in mid-travel. This bit indicates neither the Open or Close Limit Switch
is engaged. This bit is ORd with bits 00, 01, 03, 04. Value of 1=True, Value of 0=False.
Bit 03 Opening – Valve traveling in the Open direction. This bit is ORd with bits 00, 01, 02, 04. Value of 1=True, Value
of 0=False.
Bit 04 Closing – Valve traveling in the Close direction. This bit is ORd with bits 00, 01, 02, 03. Value of 1=True, Value
of 0=False.
Bit 05 Valve Jammed – Valve is jammed. This bit indicates the valve was traveling or attempting to travel in either the
Open or Close direction and has tripped the torque switch. This bit is ONLY active should the actuator be commanded
to move via the pushbutton station or remote control and an overtorque condition occurs. Value of 1=True, Value of
0=False.
Bit 06 NOT in Remote – Monitors the actuator LCS. Indicates the LCS has been switched to the Local or Stop posi-
tion. The host will not be able to control the actuator. Value of 1=True, Value of 0=False.
Bit 07 Combined Fault – The combined fault bit indicates there is a severe problem with the field unit. When this bit
is TRUE, the actuator must be considered “OFFLINE.” This bit indicates a fault when both bits (10 and 11) are TRUE
or bit 5 or bit 8, or bit 9, or bit 15 is TRUE. Value of 1=True, Value of 0=False.
Bit 08 Thermal Overload Fault – Indicates the motor has overheated and the thermistor has opened. This unit
is unable to operate and time is required for the motor to cool and reset the thermistor. Value of 1=True, Value of
0=False.
Bit 09 Future Implementation
Bit 10 Channel A Fail – Indicated field unit has stopped communicating on network Channel A (A1). Monitors
communication on terminal points 5 and 4. Value of 1=True, Value of 0=False.
Bit 11 Channel B Fail – Indicated field unit has stopped communicating on network Channel B (A2). Monitors
communication on terminal points 13 and 14. Value of 1=True, Value of 0=False.
Bit 12 Open Torque Switch Fault – Indicates an overtorque condition while traveling in the open direction. The
actuator will not move in the open direction again unless the actuator is first moved toward the close position. Torque
switch is not set when a normal torque out occurs at the torque limit. Value of 1=True, Value of 0=False.