CONFIGURA TION 189
13.8.1 Connecting PINs with different units
When using the available methods of connection it is perfectly feasible, indeed likely, that an output PIN
scaled in one set of units will be linked to another PIN normally scaled in a different set of units. E.g. The
output of analogue input terminal scaled in % may be connected to the ramp parameter called FORW ARD UP
TIME, which is scaled in seconds. This is no problem for the system because w hen it is processing the blocks
it works in an internal system of pure numbers. This allows PINs of any type of units and scaling range to be
inter-connected. To do this it follows a simple set of rules.
The internal pure number range is a 5 digit number equal to + /-30,000 counts.
All linear parameters w ork with numbers that lie within this range.
13.8.1.1 Connecting linear values with different units
The pure number for any parameter can be found by stripping out the decimal point and the units.
0.1 = 1
5.00% = 500
200.00 = 20,000
E.g. 60)DROP O UT DELA Y range 0.1 to 60 0.0 seconds. In this case the pure number range is 1 to 6000.
59)DROP OUT SPEED range 0.00 to 100.00%. In this case the pure number range is 0 to 10,00 0.
When a connection is made the pure number is transferred from the output to the input during processing.
If the pure number that arrives at a PIN lies outside the range of that PIN then it will automatically be
clamped to the maximum limit of the target PIN.
E.g. 129)TA CHO V OLTS MON = 190.00 VOLTS pure number = 19,000 is connected to
24)REVERSE UP TIME. This has a range of 0.1 to 60 0.0 SECONDS. When the pure number of
19,000 arrives it will be clamped to 6,000 and displayed as 600.0 SECONDS.
13.8.1.2 Connecting logic values with different messages
In the system there are several parameters that have only 2 states, and some that have more than 2.
E.g. 64)SPD/CUR REF 3 SIGN IN VERT State 0 2 states
or NON-INVERT State 1
29)RA MP AUTO PRESET = DIS ABLED State 0 2 states
or ENABLED State 1
9)SPEED FBK TYPE = ARMA TURE VOLT A GE State 0 5 states
T A CHOGENERAT OR State 1
ENC ODER State 2
ENC ODER + A VF State 3
ENC ODER + T A CHO State 4
When using 2 state logic parameters the system sees one state as 1 and the other as a 0
according to this table.
LOGIC 1 PARA METER LO GIC 0 PARAMETER
HIGH LO W
ENABLED DISABLED
MO TOR 2 MO TOR 1
IN VERT NON-INVERT
Non zero or negative value in logic
statement
Zero value in logic statement
If the value is connected from a PIN which uses a binary or hexadecimal string (e.g.digital IO monitor) then
the pure decimal equivalent is used. When calculating the decimal equivalent, the most significant bit is on
the right and the least significant on the left.
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