Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 125)

Publication 1760-UM002B-EN-P - March 2005
Wiring with Pico GFX-70 4-15
Number Formats
Pico GFX-70 makes computations with a signed 31-bit value.
The value range is:
-2147483648 to +2147483647
With a 31-bit value, the 32nd bit is the sign bit.
Bit 32 = state “0” means a positive number.
Example:
00000000000000000000010000010010
bin
= 412
hex
= 1042
dec
Bit 32 = 1 means a negative number.
Example:
11111111111111111101110010101110
bin
= FFFFDCAE
hex
= -9042
dec
Circuit Diagram Display
In the Pico GFX-70 circuit diagram, contacts and coils of relays are connected
up from left to right - from the contact to the coil. The circuit diagram is
created on a hidden wiring grid containing contact fields, coil fields and circuit
connections. It is then wired up with connections.
• Insert contacts in the four contact fields. The first contact field on
the left is automatically connected to the voltage.
• Insert the relay coil to be controlled together with its function and
designation in the coil field. The coil designation consists of the coil
name, coil number and function block from the function designation.
The coil function defines the method of operation of the coil.
• Every line in the circuit diagram forms a circuit connection. With
the Pico GFX-70 up to 256 circuit connections can be wired in a circuit
diagram.
IMPORTANT
The marker byte (MB) and marker word (MW) number
formats are unsigned.