PCC-IV Instruction Manual (Rev. 0.1)
Page 6-9
Section 6
– Blockware Functions
Technical Reference
F33
[MSEL] Median Selector
Function
MSEL
selects the median (i.e., middle) of the three Inputs and copies that value to its Block Output.
Examples:
A Input
B Input
C Input
Block Output
10 %
15%
14%
14%
5 %
- 10%
12 %
5 %
77 %
78 %
78 %
78 %
If this function is configured with only two active Inputs, the third Input will be the default Block 0 [A0%]. In this case,
the Median selection would compare the two active Inputs to 0%.
---------------------------------------------------------------------------------------------
NAME: MSEL SINGLE USE FUNCTION: N OUTPUT TYPE: A
---------------------------------------------------------------------------------------------
Input Type Description Notes
_____________________________________________________________________________________________
1 A A INPUT
2 A B INPUT
3 A C INPUT
No Parameters
F34
[ASW] Analog Switch
Function
ASW
is used to switch the Block Output between one of
two analog Input signals under control of a discrete (on/off) Select
signal. The concept is like an SPDT relay or 3 port solenoid valve.
When the Select signal is 0 (low) the “A” analog Input is selected
and passed to the
ASW
Block Output. When Select = 1 (high), the
“B” signal is passed to the Output.
Transfer Rate Limiting: When Parameter 1 = 0 (Transfer Rate
Limiting is OFF), the Block Output changes instantaneously when
the Select Input changes.
When Parameter 1 = 1 (Transfer Rate Limiting is ON), the rate of
change of the Block Output signal is limited for the duration of the
transfer. After the Block Output becomes equal to the selected
Input, the rate limiting is disabled and the Output will track the
selected Input with no rate of change limiting. Independent rate-
of-change limits are provided for A to B, and B to A transfers.
The Transfer Rate of Change feature can be used to provide
bumpless transfer, and for ramp generators.
---------------------------------------------------------------------------------------------
NAME: ASW SINGLE USE FUNCTION: N OUTPUT TYPE: A
---------------------------------------------------------------------------------------------
Input Type Description Notes
_____________________________________________________________________________________________
1 A A INPUT
2 A B INPUT
3 D SELECT INPUT (0 = A Input, 1 = B Input) 1
Parameter Description Default Max Min Code Notes
_____________________________________________________________________________________________
1 XFER RATE LIMITING 0=OFF 1=ON 0 1 0 2 2
2 A TO B %/SEC RATE LIMIT 1.00 100.00 0.10 2
3 B TO A %/SEC RATE LIMIT 1.00 100.00 0.10 2
Notes:
1. Output =
“A” Input when “Select” = 0, Output = “B” Input when “Select” = 1
2. When “Xfer Rate Limiting” = 0, the Output changes instantaneously when “Select” changes.
A
B
Select
Output
0=A, 1=B
Output
A
B
1
0
1
0
Select
Xfer Limiting
Time
