Table 3-4 Function Block Types - Honeywell VPR100 User Manual

Function block Type
name
Alarm AL
Analog Input AI
Analog Output AO
Calculated Value CV
Constant CN
Discrete Input DI
Discrete Output DO
Loop LP
Setpoint Profiler SP
System SY
Totalizer TL
* Depends on options ordered.
Why use function blocks?
Function blocks give you configuration flexibility. For instance, the instrument does not have a dedicated
relay that is activated during an alarm; instead, you can program any of several Alarm function blocks to
control any relay. Also, there is not a specific input for your process variable; any of several Analog Input
function blocks can be programmed to be your process variable. In general, function blocks let you connect
the output parameter of any function block to the input parameter of any function block.
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Table 3-4 Function Block Types

VRX100 VRX150
Maximum Maximum Maximum
available available* available*
16 16
12 12
8 8
32 32
16 16
16 16
16 24
2 4
1 4
1 1
12 12
VPR & VRX – User Manual
Programming and Operating Concepts
VPR100
16 Causes alarms under specified conditions.
12 Interfaces with measuring input hardware
(thermocouple, RTD, mA, volts).
8 Interfaces with analog output hardware
(current output (CAT) or voltage output (VAT))
or with output relay hardware (time proportion
(DAT), Position Proportion (POS PROP)). Up
to 3 current/voltage outputs.
32 Performs various calculations on specified
parameters.
16 Outputs a number or an analog parameter
value.
16 Interfaces with discrete input hardware (dry
contact closure).
24 Interfaces with output relay hardware (AC
relay, DC relay, mechanical relay, open
collector output).
4 PID or ON/OFF control with various outputs.
4 Generates a time-varying setpoint for a loop's
Setpoint #2.
1 Outputs discrete status of alarms, data
storage, and diagnostics; outputs analog
value of reference junction temperature. This
function block is not programmable; its
outputs are produced automatically.
3 Outputs accumulated total over time.
Purpose
49