Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 184)

Publication 1760-UM002B-EN-P - March 2005
4-74 Wiring with Pico GFX-70
High-Speed Functions
Pico GFX-70 provides various high-speed counter functions. These counter
function blocks are coupled directly to the digital inputs. The high-speed
counter functions are only available with DC inputs.
The following functions are possible:
• Frequency counters, measure frequencies CF..
• High-speed counters, count high-speed signals CH..
• Incremental encoder counters, count two-channel incremental encoder
signals CI..
The high-speed digital inputs are I1 to I4.
The following wiring rules apply:
• I1: CF01 or CH01 or CI01
• I2: CF02 or CH02 or CI01
• I3: CF03 or CH03 or CI02
• I4: CF04 or CH04 or CI02
Example:
• I1: high-speed counter CH01
• I2: frequency counter CF02
• I3: incremental encoder channel A CI02
• I4: incremental encoder channel B CI02
Example: function block list in the FUNCTION RELAYS menu:
CI01
CF01
CH01
All function blocks access digital input I1.
Only CH01 supplies the correct value.
IMPORTANT
Every digital input I .. may only be used once by the CF,
CH, and CI function blocks.
The incremental encoder requires an input pair.