Flowserve Logix 510+ - User Manual

Questions and Answers

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Erin ClarkAug 15, 2025
What to do if Flowserve Logix 510+ Valve Positioners are stuck fully open or closed?
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  Roberto ReyesAug 15, 2025
  If your Flowserve Valve Positioner's position is fully open or closed and doesn't respond to commands, here's what to check: 1. Perform stroke calibration (Quick-Cal). 2. Verify hardware connections of the inner-loop hall sensor. 3. Check ATO (Air-to-open) and ATC (Air-to-Close) settings and recalibrate using Quick-Cal to apply settings. 4. Verify ATO/ATC actuator tubing. 5. Consider replacing the electro-pneumatic converter. 6. Adjust the inner-loop offset to see if proper control resumes. Possible causes are uncalibrated stroke, disconnected inner-loop hall sensor, wrong air action entered in software, backward actuator tubing, malfunctioning electro-pneumatic converter, or incorrect inner-loop offset.
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Wendy BlackAug 18, 2025
Why is the Flowserve Valve Positioners valve position reading incorrect?
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  Kyle JacksonAug 18, 2025
  If the valve position reading on your Flowserve Valve Positioners is not what you expect, consider these potential causes and solutions: * Reposition the stem position sensor if it's mounted 180 degrees off. * Perform a Stroke calibration (Quick-Cal). * Verify Tight Shutoff settings. * Verify custom characterization or soft-stop limits. This issue may arise due to incorrect stem position sensor mounting, uncalibrated stroke, active Tight Shutoff MPC (Minimum position cutoff), or active custom characterization or soft stops.
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Charles ManningAug 21, 2025
How to fix sticking or hunting operation of Flowserve Valve Positioners?
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  Sandra AndersonAug 21, 2025
  If your Flowserve Valve Positioner is sticking or hunting, here's what you can do: * Check the air supply for proper filtering and compliance with ISA specifications ISA-7.0.01. * Lower proportional gain settings. * Enable the stability DIP switch on the local interface and recalibrate. If the problem persists, adjust the pressure control window with a handheld communicator or ValveSight and recalibrate. This behavior may be due to contamination of the electro-pneumatic converter, incorrect control tuning parameters, high packing friction, or a corroded or dirty spool valve.
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Aaron ThomasAug 25, 2025
What to do if Flowserve Logix 510+ unit does not respond to analog commands?
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  Briana KeithAug 26, 2025
  If your Flowserve Valve Positioners unit isn't responding to analog commands, here's what you should check: * Switch to analog command mode using the procedure outlined in Section 9.3 Command Source Reset, use the ValveSight DTM, or use a handheld communicator. * Check Status Codes, correct any calibration errors, and then recalibrate. This issue may occur because the positioner is in digital command mode or due to an error during calibration.
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Cynthia BarajasAug 31, 2025
What causes low or high supply pressure warning in Flowserve Logix 510+?
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  miguel81Aug 31, 2025
  If you're getting a low or high supply pressure warning on your Flowserve Valve Positioners: * For low supply pressure: Regulate the supply pressure at the positioner above 1.3 bar (19 PSI). Ensure the system air/gas supply is adequate. Repair any kinked or restricted supply tubing. Check for pneumatic leaks in the actuator and actuator tubing. Recalibrate pressure sensors. Check the pressure sensor board connections and replace the pressure sensor board if necessary. * For high supply pressure: Regulate the supply pressure at the positioner below the maximum limit recommended for your actuator. Low supply pressure can cause poor valve response or positioner failure, while supply pressure exceeding the maximum rating on the actuator can be a potential hazard.
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Charles WagnerSep 3, 2025
Why Flowserve Valve Positioners valve closed or opened too far?
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  Edward NelsonSep 3, 2025
  If the valve on your Flowserve Valve Positioners closed or opened farther than it did at the last calibration by 0.5%, check the feedback arm linkage and ensure the valve stem connection is tight. Recalibrate the stroke. If the process cannot be interrupted a service technician may be able to adjust the calibration. The description of the problem is: the valve was in use, it closed or opened farther than it did at the last calibration by 0.5%.
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gcopelandSep 7, 2025
How to troubleshoot Flowserve Valve Positioners when no LED is blinking?
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  Loretta RodriguezSep 7, 2025
  If no LED is blinking on your Flowserve Valve Positioners, verify the following: 1. Ensure the current source supplies at least 3.8 mA. 2. Ensure the voltage source supplies at least 10VDC. 3. Check wiring for correct polarity. Possible causes include a current source that is too low, a voltage of current source that is too low, or incorrect wiring polarity.
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garciajasonSep 12, 2025
What does software error warning mean on Flowserve Logix 510+?
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  Carrie PollardSep 12, 2025
  If you receive a software error warning on your Flowserve Valve Positioners, which may be caused by transient conditions, and if the error persists, replace the main board. The error may be due to an oscillator fault, position sensor ADC failure, supply voltage error, reference voltage error, shunt voltage error, or piezo voltage error.
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Deanna FowlerNov 27, 2025
Why are my Flowserve Valve Positioners communications erratic?
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  brandonvalenzuelaNov 27, 2025
  If you're experiencing erratic communications with your Flowserve Valve Positioners, consider the following: 1. Ensure the current source bandwidth is limited to 25Hz; the maximum allowable current source rate of change is 924 mA per second. 2. Check cable size, length, and capacitance. See Section 7 ELECTRICAL CONNECTIONS. 3. Verify the laptop battery is not low if using a HART modem connected to a PC RS-232 port. 4. Ensure you are using a HART compatible I.S. barrier. 5. If the current source is stripping (filtering) the HART signal, use a 250? resistor and a 22 µF capacitor to create a HART filter according to the schematic: 250? 22 ?F HART Control System Comm Device. Possible causes include an unlimited current source bandwidth, exceeding maximum cable length or impedance, insuf...

Summary

General Information

Basic Operation

Explains the fundamental working principle of the digital positioner and its core functions.

Command Input and Final Command

Details how input signals are processed, characterized, and finalized for valve control.

Specifications

Positioner Performance Characteristics

Lists key performance metrics like resolution, linearity, repeatability, and hysteresis.

Hazardous Area Certifications

Hazardous Area Certifications Overview

Provides crucial certification details and special conditions for safe operation in hazardous locations.

Mounting and Installing

Mounting to Mark One Linear Valves

Step-by-step instructions for mounting the positioner to Mark One linear valves.

Mounting to FlowTop Linear Valves

Detailed guide for installing the positioner on FlowTop linear actuators.

Mounting to Standard Valtek Rotary Valves

Procedures for mounting the positioner to Valtek rotary valves using a linkage.

Mounting to Rotary NAMUR (AutoMax) Valves

Mounting procedure for AutoMax valves using a NAMUR interface.

Tubing

Determine Air Action

Explains how to correctly tube the positioner for air-to-open or air-to-close valve action.

Electrical Connections

Command Input (4-20 mA) Connection

Compliance Voltage

Intrinsically Safe Barriers

Guidance on selecting HART-compatible barriers for intrinsically safe installations.

Multi-Function Card (AO, DO, DI)

Startup

Quick Start Instructions

A simplified guide for initial setup, DIP switch configuration, and calibration.

Local User Interface Overview

Configuration Switch Settings

Stroke Calibration

Instructions for performing automatic stroke calibration for precise valve positioning.

Positioner Functions (No Display Required)

Live Manual Tuning (Adjusting the Gain)

Local Control Of Valve Position

Factory Reset

Positioner Functions (LCD Display)

Main Display View

Menu Overview

Calibration

Comprehensive calibration procedures including stroke, pressure, and friction.

Configuration (Characterization)

Model Features

MD+ Positioner Diagnostic Levels

Valvesight DTM Diagnostic Levels

Multi-Function Card

Analog Output (AO)

Discrete Output (DO)

Discrete Input (DI)

Requirements For Safety Integrity

Fail Safe State

Defines the positioner's fail-safe state under various conditions (poppet, spool relays).

Safety Function

Outlines the positioner's safety function upon loss of analog input power.

Required Configuration Settings

Essential configuration settings for achieving designed safety integrity for the application.

Maximum Achievable SIL

Information on the Safety Integrity Level (SIL) achievable by the positioner in simplex/redundant configurations.

Proof Testing

Procedures for proof testing to detect failures in the safety instrumented function.

Maintenance

Troubleshooting

Troubleshooting Guide

A table correlating failures with probable causes and corrective actions for common issues.

Status Code Index

Status Code Descriptions

How To Order

Positioners

Spare Parts Kits

Flowserve Logix 510+ Specifications

General

Type	Digital Valve Positioner
Input Signal	4-20 mA
Output Signal	Pneumatic
Enclosure Rating	NEMA 4X, IP66
Communication Protocol	HART
Supply Pressure	20 to 100 psi
Operating Temperature Range	-40 to 85°C
Accuracy	±0.5% of span
Repeatability	≤0.1%
Materials	Aluminum
Mounting	Direct mounting on linear and rotary actuators