Function Block Timing; Sweep Impact Times; Sizes Of Timers, Counters, Math Functions, Trig Functions, Log Functions - GE VersaMax PLC User Manual

Function Block Timing

Group
Function
OnDelay Timer
Timers
Timer
OffDelay Timer
Up Counter
Counters
Down Counter
Addition (INT)
Math
Addition (DINT)
Addition (REAL)
302 GFK-1503E
For public disclosure
The following tables show the sweep impact times and size information for all supported
function blocks of the CPU.

Sweep Impact Times

The tables show two sweep impact times are shown for each function. An Increment time
is shown for functions that can have variable length inputs (table functions):
Sweep impact time (in microseconds) when a function block has
Enabled
been enabled; power flow to the function block.
Sweep impact time (in microseconds) when a function block has
Disabled been disabled; no power-flow to function block and/or power-flow
to reset of function block.
Incremental time (in microseconds/input unit) to add to the base
function time for each addition to the length of an input parameter.
Increment
Only applies to table functions that can have varying input lengths
(i.e. Search, Array Moves, etc.).
All timings represent typical execution time. Timings may vary with input and error
conditions. Each timing includes the time to execute one contact, and normal overhead
including a connection with a programmer.
Note Timings listed in previous versions of this manual did not include this overhead.
• For table functions, increment is in units of length specified.
• For bit operation functions, microseconds/bit.
• For data move functions, microseconds/number of bits or words.
• For functions that have an increment value, multiply the increment by (Length –1)
and add that value to the base time to get total instruction time.
Sizes of Timers, Counters, Math Functions, Trig
Functions, Log Functions
The size of a function is the number of bytes consumed in user logic space for each
instance of the function in a ladder diagram application program.
CPU001/002
Enabled Disabled
119
110
110
90
93
62
60
139
CPU005/E05
Enabled Disabled
90 90
80 81
80 81
90 70
90 70
12 50
12 50
12 99
Increment
–
69
–
60
–
60
–
70
–
70
–
10
–
10
–
10
VersaMax PLC User Manual
Size
15
15
15
13
13
13
19
17