Honeywell VRX180 Manuale Utente

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Programming and Operating Concepts 
 
Video Recorder – User Manual 
56
 
LP
2
OV
2-character output code
OV
OS
BC
See Table 3-4 for all choices.
Channel number  of  function block
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
Choices depend on type of function block.
Commonly used choices:
Choices vary depending on type of function
block
SY - System
TL - Totalizer
 
Figure 3-9   Function Block Connection Format 
 
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.  It 
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.