Siemens SIMATIC S5-115U, Руководство пользователя

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S5-115U Manual Integral Blocks
11 Integral Blocks
The following are integrated in the operating system of the central processing units:
•
Some standard function blocks
• Some organization blocks
• A default DB1 for initializing internal functions.
Integral function blocks and organization blocks are programmed in machine language and so
execute at high speed. They do not use space in internal program memory.
Integral blocks are called in the control program like all other blocks; they can only be interrupted
by process interrupts.
(Integral) function blocks which can be called in the control program for special functions are the
subject of this chapter. Those blocks which the operating system of the CPU calls automatically
when specific events occur (e.g. programming errors, PLC faults) are not dealt with here (see
Chapter 7).
Table 11-1. Overview of Integral Blocks
1 Execution time not including block-dependent compression
2 The execution time depends on the size of the data block to be transferred (see Section 11.1.3, "Frame Size")
3 See Section 2.6.2
Call
Length
(in Words)
Tranfer PIQ to outputs
PID control algorithm
16-bit fixed-point converter
16-bit binary multiplier
16-bit binary divider
Read analog value (see Chapter 10)
Output
analog value (see Chapter 10)
< 2.3
< 1.0
11
9
7
10
Execution time
(in Millise-
conds)
FB
FB
Block
Type No. Name
Function
241
242
243
FB
FB
FB
FB
FB
FB 244
245
246
247
248
249 SEND
2
RECEIVE
2
FETCH
CONTROL
RESET
SYNCHRON
FB
FB 250
251
4-tetrad BCD code converter
COD : 16
MUL : 16
DIV : 16
RLG : AE
RLG : AA
Send data
Receive data
Fetch data
Monitor job processing
Delete job
Initialize interface
COD : B4
FB
FB
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a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
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a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
240 5
6
< 0.8
< 1.0
< 4
approx. 0.6
< 4
6.5 ms to 10 s
2.0
5.2
Restart scan time 31 OB < 0.14
2.0 OB 251
254
3
255
3
239 FB < 0.8
< 0.6 FB 238
DELETE
COMPR
1
5
4
Delete block
Compress PLC memory
Read digital inputs
Variable time loop 160 OB
Parameterize internal functions 1
OB
DB
OB
EWA 4NEB 811 6130-02b
11-1