Iec 61131-3 Second edition 2003-01 Programmable controllers – Part 3: Programming languages

Table D.1 - Implementation-dependent parameters
Sublause
Parameters
2.5.2
Maximum number of function block specifications and instantiations
2.5.2.1a
Function block input variable assignment when EN is FALSE
2.5.2.3.3
Pvmin, Pvmax of counters
2.5.2.3.4
Effect of a change in the value of a PT input during a timing operation
2.5.3
Program size limitations
2.6.2
Precision of step elapsed time
Maximum number of steps per SFC
2.6.3
Maximum number of transitions per SFC and per step
2.6.4.2
Maximum number of action blocks per step
2.6.4.5
Access to the functional equivalent of the Q or A outputs
2.6.5
Transition clearing time
Maximum width of diverge/converge constructs
2.7.1
Contents of RESOURCE libraries
2.7.1
Effect of using READ_WRITE access to function block outputs
2.7.2
Maximum number of tasks
Task interval resolution
3.3.1
Maximum length of expressions
3.3.2
Maximum length of statements
3.3.2.3
Maximum number of CASE selections
3.3.2.4
Value of control variable upon termination of FOR loop
4.1.1
Restrictions on network topology
4.1.3
Evaluation order of feedback loops
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61131-3 
 IEC:2003(E)
– 167 –
ANNEX E
(normative)
Error conditions
The error conditions defined in this standard, and the primary reference clause for each, are listed in
table E.1. These errors may be detected during preparation of the program for execution or during
execution of the program. The manufacturer shall specify the disposition of these errors according to
the provisions of subclause 1.5.1 of this part of IEC 61131.