IAI America TT-C3 - Manual (Page 69)

59
INTELLIGENT ACTUATOR
Chapter 3 X SEL Lanhuage Data
1.
V
alues
and
Symbols
Used
in
SEL
Language
z The variables and flags in the global range are retained until the controller is powered off.
z The variables and flags in the local range are cleared when the program is started (the data are
also cleared when the controller is powered off).
z Ranges of values that can be used in SEL language
Integers and real numbers can be used. However, pay due attention to the following limitations:
[1] Numeric data
The Tabletop Robot can handle values of maximum eight digits including a sign and a decimal
point.
Integer: -9,999,999 to 99,999,999
Real number: Maximum eight digits including a sign and decimal point, regardless of the size of
value
Example) 999999.9, 0.123456, -0.12345
If a floating point is used in operations, the number of valid digits will be limited to seven. Also note
that operations using a floating point are subject to error.
[2] Position data
The input range of position data consists of four integer digits and three decimal digits.
–9999.999 to 9999.999
(The maximum value varies depending on the Tabletop Robot.)
If position data are used in internal operations as numeric data (repeated multiplications and
divisions), the precision of the last digit may decrease.
Consider the above limitations fully when using values. Particularly when the CPEQ command is
used in a comparison operation using real numbers, a match will rarely result. In this case, the
CPLE or CPGE command that looks at the magnitude relationship of two terms must be used.
1-2 I/O Ports (External DIOs)
(1) Input ports
Used as input ports for limit switches, sensor switches, etc.
Input number assignment
016 to 031 (standard)
(2) Output ports
Used as various output ports.
Output number assignment
316 to 331 (standard)
Note: The parameters are normally assigned to the above input port and output port numbers
before shipment.