Figure 3-24 Function Block Diagram Of Set Point Profile Control Of Figure 3-16; Figure 3-25 Discrete Inputs Controlling Execution Of Set Point Profiler Function Block - Honeywell VRX180 User Manual

TYPE J
THERMOCOUPLE

Figure 3-24 Function Block Diagram Of Set Point Profile Control Of Figure 3-16

Figure 3-24 basically depicts all the components of the Figure 3-16's control configuration with a set
point profiler function block denoted by SP1. The profiler's output (SP1 OV) is connected to the remote
set point input of LP1. Depending on the model number of the instrument, up to four set point profiler
function blocks (SP1 through SP4) may be included within the instrument's feature capacities. Note that
while the profiler of SP1 was specified in Figure 3-24's diagram, any of the profilers within the instrument
could have been used.
When a set point profile is executed, discrete inputs are typically used in conjunction with external
switches to control the set point profiler function block. For example, the set point profiler function block
can be programmed to start, hold, or reset based on discrete input statuses. See Figure 3-25.
TYPE J
AI1
THERMOCOUPLE
External
INPUT TYPE = J
Switches RANGE LOW = 0
RANGE HIGH = 1000
DI1 OS
DI1
START
DI2 OS
HOLD
DI2
RESET
DI3
DI3 OS
"OS" = OUTPUT STATE

Figure 3-25 Discrete Inputs Controlling Execution Of Set Point Profiler Function Block

AI1 OV
AI1
PV
SP2
INPUT TYPE = J
RANGE LOW = 0
RANGE HIGH = 1000 TYPE = STANDARD
SP1 = 500
SP2 = SP1 OV
GAIN = 10
RESET = 1
RATE = 0
SP1 OV
SP1
AI1 OV
PV
SP2
TYPE = STANDARD
SP1 = 500
SP2 = SP1 OV
GAIN = 10
RESET = 1
RATE = 0
SP1 OV
SP1
Video Recorder – User Manual
Programming and Operating Concepts
AO1 BC
FB
LP1 OV
LP1
AO1 BC
FB
LP1 OV
LP1
4 TO 20 mA
IN AO1
OUTPUT TYPE = CAT
IN LOW LIMIT = 0
IN HIGH LIMIT = 100
OUT LOW LIMIT = 4
OUT HIGH LIMIT = 20
4 TO 20 mA
IN AO1
OUTPUT TYPE = CAT
IN LOW LIMIT = 0
IN HIGH LIMIT = 100
OUT LOW LIMIT = 4
OUT HIGH LIMIT = 20
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