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F3200 Installation & Programming Manual Document No: LT0122
Programming System Configuration
Page 7-18 5 July 2001 Issue 2.7
OPERANDS TYPE 1 (CONTINUED)
Open Collector (OC)
OCxx
where xx = 1-64
OCxx is true if OCxx is active from its own logic equation and false if OCxx is inactive.
New Alarm (NA)
The New Alarm token (NA) is a set/reset latch, which incorporates two lists of tokens. One
list of tokens "sets" the latch i.e. when a token goes true the latch goes true and stays true,
even if the token returns to false. The other list of tokens "resets" the latch i.e. when a token
goes true the latch returns to false and stays false until a token in the "set" list goes from
false to true. On power up, NA is false. NA takes the form:
NA[r1,r2,....rn;s1,s2,....sm]
where r1-rn is the list of tokens which reset the latch and
s1-sm is the list of tokens which set the latch.
Entry of an NA token into an equation is described in Section 7.4.5.
If a set and a reset token were to both go true at the same time, then reset will override set,
ie. the latch will turn off.
Variables
Vxxx
where xxx = 1 - 256
A variable is a "label" operand which may be equated to a common block of logic that occurs
in the equations of more than one output. Using a variable saves re-entering and repeating
the execution of the identical portion of the logic equations.
Note that all variables are set to "false" on power up.
Network Variables
NVsss:nnn
where sss = SID number 1-254 and nnn = variable number 0-127.
A networked F3200 or NDU has 128 network variables of its own that it may assign values to
with an equation e.g. NV5=Z1A+Z2A
The state of the 128 local network variables is transmitted onto the network for use by other
systems. This panel receives network variables from other systems and may use their
values in equations but may not assign values to network variables from other systems.
All network variables are set to FALSE on power up.