Figure 3-9 Function Block Connection Format - Honeywell VRX180 User Manual

Programming and Operating Concepts
Type of
function block
Choices:
AI - Analog Input
AL - Alarm
AO - Analog Output
CV - Calculated Value
CN - Constant
DI - Discrete Input
DO - Discrete Output
LP - Loop (control)
SP - Setpoint Profiler
SY - System
TL - Totalizer
Before programming a function block's input parameter with a CV's (Calculated Value) output code, you
must program the CV first. Otherwise, the CV's output parameter will not be available for programming.
The function block SY (System Parameter) operates internally and cannot be programmed.
automatically produces outputs which reflect the status of alarms, data storage, diagnostics, and
reference junction temperature. These outputs can be used as inputs to function blocks.
How to program an input parameter with a number
Besides connecting an input parameter to another function block, you can program an input parameter
with a number. The instrument will accept -999,999 to 9,999,999.
Continuing with the previous example, assume we want Loop #2's Setpoint #2 to be a number.
Therefore, we must program Loop #2's Setpoint #2 parameter with a number, say 95. The following
procedure shows how.
56
LP 2
2-character output code
Choices depend on type of function block.
Commonly used choices:
OV
OS
BC
See Table 3-4 for all choices.
Channel number of function block
Choices vary depending on type of function
block

Figure 3-9 Function Block Connection Format

Video Recorder – User Manual
OV
It