Contents
GFK-0467K Contents ix
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..............................................................4-1Section 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