Honeywell VRX180 - Manual (Page 135)

Programming Function Blocks and Features
Video Recorder – User Manual 121
BCD
Converts up to 8 discrete inputs’ binary coded decimal into an unsigned integer and output the integer
as CVn OV. For example, 00000100 = 4.
On the instrument, when the enable is triggered, the set point program specified by the value of CVn OV
is copied from internal storage to the Profile function block(s) where the profile(s) can be programmed
or executed.
Table 4-31 describes the BCD prompts. See Table 4-2 for additional prompts.
Table 4-31 BCD Prompts
Prompt Range/Selections Definition
OUT LOW LIMIT
OUT HIGH LIMIT
OFF or number Displayed output value will be clamped and will flash when
these limits are exceeded.
BIT 0
through
BIT 7
OFF, discrete parameter, 0,
1 The binary coded decimal represented by the states of these
discretes will be converted into an unsigned integer. BIT 7 is
the most significant bit and BIT 0 is the least significant bit.
ENABLE OFF, discrete parameter, 0,
1 On the instrument, when this discrete transitions from off(0)
to on(1), the specified program’s profile(s) will be loaded from
internal memory to the Profile function block(s). See Table
4-32.
Example #1, loading a 2-profile program
You are programming a 2-programmer instrument. According to Table 4-32, a 2-programmer
instrument can run 2 profiles at a time and can store in its internal memory up to 6 programs, each
containing 2 profiles.
Suppose the BCD bits are programmed as follows: Bit 2 = 1, Bit 1 = 1, Bit 0 = 0. This sequence of bits
equals the number 6 and is the value of CVn OV. When the Enable discrete is triggered ON(1), the
profiles in Program #6 will be loaded from internal memory into the function blocks for Profile #1 and
Profile #2, where they can be edited or run.
Example #2, loading a 4-profile program
You are programming a 4-programmer instrument. According to Table 4-32, a 4-programmer
instrument can run 4 profiles at a time and can store in its internal memory up to 3 programs, each
containing 4 profiles.
Suppose the BCD bits are programmed as follows: Bit 2 = 0, Bit 1 = 1, Bit 0 = 0. This sequence of bits
equals the number 2 and is the value of CVn OV. When the Enable discrete is triggered ON(1), the
profiles in Program #2 will be loaded from internal memory into the function blocks for Profiles #1
through #4, where they can be edited or run.