Instruction manual

Analog Latches
890USE18300 September 2003 145
Physical Output The output of a high-level analog latch block is a 16-bit word. It may be an unsigned
integer in the range 0 to 65 535 or a signed integer in the range -32 768 to +32 767.
The output is latched to the value of the analog input when the latch trigger is 1 and
unlatched when the trigger is 0.
The physical output (See Configuring the Physical Output from a Reflex Block,
p. 27) needs to be mapped to an action module:
The action module may be an analog output module on the island bus. In this
case, you need to specify one of the analog output channels as the destination
for the reflex output.
If the latch is the first block in a nested reflex action (See Nesting Two Reflex
Blocks, p. 36), the action module needs to be the same action module as the one
specified for the second reflex block. Specify the channel as None.
Note: The type of output value from this block matches the type of input value—
e.g., if you input an unsigned integer value, the output will be an unsigned integer
value. The block itself does not discriminate between an unsigned value of 65 535
and a signed value of -32 768. You need to make sure that the block output is being
sent to an output module that can handle the output value correctly.