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Programming and Operating Concepts
Video Recorder – User Manual 71
AI1
TYPE J
THERMOCOUPLE
AI1 OV
INPUT TYPE = J
RANGE LOW = 0
RANGE HIGH = 1000
LP1
PV
LP1 OV
TYPE = STANDARD
SP1 = 500
SP2 = SP1 OV
GAIN = 10
RESET = 1
RATE = 0
AO1IN
4 TO 20 mA
OUTPUT TYPE = CAT
IN LOW LIMIT = 0
IN HIGH LIMIT = 100
OUT LOW LIMIT = 4
OUT HIGH LIMIT = 20
FB
AO1 BC
SP2
SP1
SP1 OV
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.
External
Switches
DI1
DI1 OS
DI2
DI2 OS
DI3
DI3 OS
AI1
TYPE J
THERMOCOUPLE
AI1 OV
INPUT TYPE = J
RANGE LOW = 0
RANGE HIGH = 1000
LP1
PV
LP1 OV
TYPE = STANDARD
SP1 = 500
SP2 = SP1 OV
GAIN = 10
RESET = 1
RATE = 0
AO1
IN
4 TO 20 mA
OUTPUT TYPE = CAT
IN LOW LIMIT = 0
IN HIGH LIMIT = 100
OUT LOW LIMIT = 4
OUT HIGH LIMIT = 20
FB
AO1 BC
SP2
SP1
SP1 OV
START
HOLD
RESET
“OS” = OUTPUT STATE
Figure 3-25 Discrete Inputs Controlling Execution Of Set Point Profiler Function Block