Transducer Block; General; Correspondence Between Channels And I/O Signals - GE FVP110 Maintenance Manual

Transducer Block

General

The transducer block works as an interface between the hardware I/O (actuator, sensor)
and internal function blocks. Most functions of the FVP110 as a valve positioner are packed
in the transducer block. Major functions of the transducer blocks include:
❑
Transmission and reception of setpoint and readback signals for valve position
❑
Setpoint high/low limiters
❑
Auto tuning
❑
Valve tight-shut and full-open actions
❑
Valve position-to-flow rate characteristics conversion
❑
Travel calibration
❑
Diagnostics of valve and positioner
❑
Valve position limit switches
❑
Pressure and temperature measurement (pressure measurement requires the
optional sensor)
❑
Fail safe
The FVP110 transducer block is connected to an AO function block and two DI blocks via its
channels as shown in Table 33 and Figure 56.
Table 33 Correspondence between Channels and I/O Signals
Channel
1
2
3
Signal
Analog input/output
Discrete output
Discrete output
123
Description
Setpoint and readback signals
High limit switch status
Low limit switch status
13