Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 359)

Publication 1760-UM002B-EN-P - March 2005
Inside Pico GFX-70 8-5
Delay Times for Inputs and
Outputs The time from reading the inputs and outputs to switching contacts in the
circuit diagram can be set in Pico GFX-70 via the delay time.
This function is useful, for example, to ensure a clean switching signal despite
contact bounce.
Figure 8.2 Pico GFX-70 input assigned a switch
Delay Times for the GFX Inputs
The delay time for DC signals is 20 ms.
Figure 8.3 Delay times for Pico GFX-70-DC
An input signal S1 must therefore be 15Vor 8V(DA) for at least 20 ms on the
input terminal before the switch contact will change from 0 to 1 (A). If
applicable, this time must also include the cycle time (B) since Pico GFX-70
does not detect the signal until the start of a cycle.
IMPORTANT
Only use as much retentive data as is actually required.
The screen with the largest memory requirement reduces
the memory available for the program. Several smaller
screens allow more space for the program.
Use as small pictures as possible with 1 bit grayscale. The
pictures should normally be 32 x 32 pixels in size to fully
utilize the optimum brilliance of the display.
S1
0V I1
1
0
1
0
S1
B
A
B
C