Links, horizontal and vertical, 4-7LN, 4-37
Locking/unlocking subroutines, 2-37LOG, 4-37
Logarithmic functions, 4-37
base 10 logarithm, 4-37natural logarithm, 4-37
Logic program checksum calculation, 2-9Logic solution, 2-8
Logical AND function, 4-49Logical NOT function, 4-53Logical OR function, 4-49Logical XOR function, 4-51LOS_IOM, 2-25LOS_SIO, 2-25
Loss of I/O module, 3-17
Loss of, or missing, option module, 3-8Low battery signal, 3-11LOW_BAT, 2-25
LT, 4-41
M
Maintenance, 3-1
Masked compare function, 4-66Master control relay function, 4-124Math functions, 4-26
ACOS, 4-35
ADD, 4-27
ASIN, 4-35
ATAN, 4-35
COS, 4-35
DEG, 4-39
DIV, 4-27
EXP, 4-37
EXPT, 4-37
LN, 4-37
LOG, 4-37
MOD, 4-31
MUL, 4-27
RAD, 4-39
SIN, 4-35
SQRT, 4-33
SUB, 4-27
TAN, 4-35
MCR, 4-124
Memory, corrupted, 3-7
Micro Models, 2-43
Mnemonics, instruction, C-1
MOD, 4-31
Model 20 I/O modules, 2-42
Model 30 I/O modules, 2-39
Modulo function, 4-31
MOVE, 4-70
Move function, 4-70
MSKCMP, 4-66
MUL, 4-27
Multiplication function, 4-27
N
Natural logarithm function, 4-37NE, 4-41
Negated coil, 4-4
Negated retentive coil, 4-5Negative transition coil, 4-5No user program present, 3-13Normally closed contact, 4-4Normally open contact, 4-4NOT, 4-53
Not equal function, 4-41
O
OFDT, 4-17Off-delay timer, 4-17
On-delay timer, 4-11,4-14ONDTR, 4-11Operation of system, 2-1Operational failures, 3-2
Option module software failure, 3-11OR, 4-49
Output references, discrete, 2-20Output register references, analog, 2-20Output scan, 2-9
OV_SWP, 2-25
Overrides, 2-21
P
Password access failure, 3-13Passwords, 2-36PB_SUM, 2-25
PCM communications with the PLC, 2-12Periodic subroutines, 2-19
PID, 4-171
PLC CPU system software failure, 3-14PLC fault table, 3-3,3-5,B-2
error codes, B-5explanations, 3-7fault action, B-5fault extra data, B-7fault group, B-4fault time stamp, B-7interpreting a fault, B-1long/short indicator, B-3rack, B-3
