GE manual Series 90-30/20/Micro Instructions Set

Chapter

4

Series 90-30/20/Micro Instructions Set

Programming consists of creating an application program for a PLC. Because the Series 90-30, 90-20, and Series 90 Micro PLCs have a common instruction set, all three can be programmed using this software. This chapter describes the programming instructions that may be used to create ladder logic programs for the Series 90-30 and Series 90-20 programmable controllers.

If Logicmaster 90-30/20/Micro programming software is not yet installed, please refer to the Programming Software User’s Manual, GFK-0466, for instructions. The user’s manual explains how to create, transfer, edit, and print programs.

Configuration is the process of assigning logical addresses, as well as other characteristics, to the hardware modules in the system. It may be done either before or after programming, using the configuration software or Hand-Held Programmer; however, it is recommended that configuration be done first. If that has not been done, you should refer to the Programming Software User’s Manual, GFK-0466, to decide whether it is best to begin programming at this time.

This chapter contains the following sections:

Section	Title	Description	Page
1	Relay Functions	Describes contacts, coils, and links.	4-2
2	Timers and	Describes on-delay and stopwatch-type timers, up counters,	4-9
	Counters	and down counters.
3	Math Functions	Describes addition, subtraction, multiplication, division,	4-26
		modulo division, square root, trigonometric functions,
		logarithmic/exponential functions, and radian conversion.
		Note that trigonometric functions, logarithmic/exponential
		functions, and radian conversion functions are only
		available with the 350 and 360 series of CPUs.
4	Relational Functions	Describes how to compare two numbers for equality, non-	4-41
		equality, greater than, greater than or equal to, less than,
		and less than or equal to.
5	Bit Operation	Describes how to perform comparison and move operations	4-47
	Functions	on bit strings.
6	Data Move Functions	Describes basic data move capabilities.	4-69
7	Table Functions	Describes how to use table functions to enter values into	4-86
		and copy values out of a table.
8	Conversion	Describes how to convert a data item from one number type	4-94
	Functions	to another.
9	Control Functions	Describes how to limit program execution and alter the way	4-107
		the CPU executes the application program by using the
		control functions.

GFK-0467K 4-1