Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 264)

Publication 1760-UM002B-EN-P - March 2005
4-154 Wiring with Pico GFX-70
Memory Requirement of the Value Limitation Function Block
The value limitation function block requires 40 bytes of memory plus 4 bytes
per constant on the function block input.
Function of the Value Limitation Function Block
The value is accepted at input VC...I1 if the enable coil is active. If the value is
greater than the upper limit value or less than the lower limit value, the
respective limit value is output at VC..QV.
Example with Timing Relay and Counter Function Block
A warning light flashes when the counter reaches 10. In the example, both
function blocks C 01 and T 01 are wired.
Figure 4.78 Hardwiring with relays
IMPORTANT
The function block must be enabled so that it can work.
Coil VC..EN is active. If coil VC..EN is not active, the
entire function block is deactivated and reset. The output
value is set to zero.
L01–
P1
P1
K1T
K1T
C R
H1
S1 S2
L01+
2s Counter
Value 10