GE 90-30/20/Micro manual O Fault Table Explanations

Contents

	Application Fault	3-12
	No User Program Present	3-13
	Corrupted User Program on Power-Up	3-13
	Password Access Failure	3-13
	PLC CPU System Software Failure	3-14
	Communications Failure During Store	3-16
	Section 3: I/O Fault Table Explanations	3-17
	Loss of I/O Module	3-17
	Addition of I/O Module	3-18
Chapter 4	Series 90-30/20/Micro Instructions Set	4-1
	Section 1: Relay Functions	4-2
	Using Contacts	4-2
	Using Coils	4-3
	Normally Open Contact — —	4-4
	Normally Closed Contact —/—	4-4
	Example:	4-4
	Coil —( )—	4-4
	Example:	4-4
	Negated Coil —(/)—	4-4
	Example:	4-4
	Retentive Coil —(M)—	4-5
	Negated Retentive Coil —(/M)—	4-5
	Positive Transition Coil —(−)—	4-5
	Negative Transition Coil —(↓)—	4-5
	Example:	4-5
	SET Coil —(S) —	4-6
	RESET Coil —(R)—	4-6
	Example:	4-6
	Retentive SET Coil —(SM)—	4-7
	Retentive RESET Coil —(RM)—	4-7
	Links	4-7
	Example:	4-7
	Continuation Coils (———<+>) and Contacts (<+>———)	4-8
	Section 2: Timers and Counters	4-9
	Function Block Data Required for Timers and Counters	4-9
	ONDTR	4-11
	Parameters:	4-12
	Valid Memory Types:	4-12
	Example:	4-13
	TMR	4-14
	Parameters:	4-15
	Valid Memory Types:	4-15

GFK-0467K Contents ix