RELIANCE 57405 Logic module

Operation with Redundant Position Feedback Devices When Configured for dual position feedback devices, the SPC uses the following method to determine the position feedback:  If either input has failed, use the functional input  If both inputs are functional: o If a tracking fault does not exist, use the average of the two inputs. o If a tracking fault exists, use the higher or lower of the two positions according to the configuration.  Configuring Feedback 1 and Feedback 2 (4 to 20) mA— Position feedback is provided by a (4 to 20) mA output transducer. Feedback 2 is automatically set to Not Used.

Operation with Two Position Demand Sources 

The SPC uses the following method to determine which position demand source to use when both sources are configured:  If one source has failed and the other source is functional, use the functional source.  If using the secondary source because the primary source failed, and the primary source becomes functional, switch back to the primary source IF: o The two sources match each other within a configurable amount, and o The primary source has been functional for at least five seconds continuously

Position Feedback Device Configuration 

The position feedback devices are selected on the Feedback page of the Configuration File Editor. Read the general information on the type of transducer being used before configuring the feedback: The SPC accepts position feedback signals from one or two (0 to 10) V output transducers, RVDTs, or LVDTs, or from a single (4 to 20) mA transducer. Refer to the SPC Plant Wiring Diagrams found in Chapter 2 for detailed information on connecting feedback devices to the SPC.

Superior products

We mainly make spare parts for DCS, PLC, robot control system and large servo system.

Main products: various modules/cards, controllers, touch screens, servo drives.

Advantages: professional off production accessories,

Fast delivery, accurate delivery time,

Main brands include ABB, GE/FANC, FOXBORO, TRICONEX, BENTLY NEVADA, A-B, EMERSON, OVATION, MOTOROLA, XYVOM, HONEYWELL, REXROTH, KUKA, NI, DEIF, Reliance Electric, Yokogawa, WOODWARD, SCHNEIDER, MOOG, PROSOFT and other brands