AVG EZTouch I/O Jr., Manual

Page: 38 / 52

EZTouch I/O
Jr.
38 / 52
Discrete Outputs
Discrete Outputs are denoted using an “O” pre-fix (e.g. O1, O4, etc.). The
maximum number of programmable Outputs available is 1 through 128.
Although, the number of discrete physical outputs available in an
EZTouch I/O
Jr.
is 6 or 8 (O1-O8, depending on the model), the remaining “O” registers can be
used as ‘Scratchbits' in the main logic. Discrete Outputs are Read-Write type.
Note: All the discrete type EZ Outputs are mapped to Discrete Outputs bits.
Word Inputs/Outputs
Input Register (Word)
Input Registers are denoted using an “IR” pre-fix (e.g. IR1, IR4, etc.). These are
16-bit Word data types (registers). The maximum number of Input Registers
available is 1 through 64. The maximum number of physical Analog Inputs
available in a
EZTouch I/O
Jr. is 4 or 2 (depending on the model). Hence, you
may only use IR1 – IR4 in your main logic. You can only Read from an IR register.
Note: All the EZ Analog Inputs (if available) are mapped to Input Registers.
Output Register (Word)
Output Registers are denoted using an “OR” pre-fix (e.g. OR1, OR4, etc.). These
are 16-bit Word data types. The maximum number of Output Registers available is
1 through 64. The
EZTouch I/O
Jr. uses OR1- ORn (n=2 or 4, depending on the
model), to connect to physical Analog outputs. OR are Read-Write type of Word
registers.
Note: All the EZ Analog Outputs (if available) are mapped to Output Registers
Internals
Discrete Internals (Discrete)
Discrete Internals are denoted using “S” pre-fix (e.g. S1, S4, etc.). There are 1024
Discrete Internals available in the
EZTouch I/O
Jr. Discrete Internals are Read-
write type and are used as “Scratchbits.” Discrete internal bits are mainly
used to control the user logic program. They do not represent a real physical
device, like a switch, output coil, etc. They are only internal to the CPU. You
cannot program discrete internals as discrete inputs or discrete outputs for the
physical inputs or outputs.
Note: In this example, memory location S1 will be powered when input I1
turns on; you can then use a discrete internal as an input in another rung.