4-8
CM35 Counter Module
(4) J31069-D0416-U001-A5-7618
4.2.2
Parameterization via Direct I/O Accesses (Only SIMATIC S5)
Parameterization via direct accesses is only permitted in the
²
period duration
measurement
²
and
²
timer
²
operating modes.
The analog I/O address area contains 8 words. The data must be written with
word accesses.
The I/O address area is used for parameterization as shown below.
Table 4-4
Assignment of the address area for parameterization via direct I/O
accesses
Offset for the
Module Start Address
Description
+0
DO byte (digital output control)
may not be written during parameterization.
+2
Control word
+4 to +14
Parameterization data
The consistency (”C bit”) in the control word is used with direct--access para-
meterization to ensure consistency of the written values within one parameter
block.
The CM35 does not evaluate the transferred values of one parameter block as
long as the C bit is not set. These values do not become valid until the con-
trol word is written with C bit = 1.
The following sequence must be used to transfer the pafameter blocks.
1. Transfer the control word with C bit = 0.
2. Transfer all required data of the parameter block.
3. Transfer the control word with C bit = 1.
Transfer next parameter block.
Note
The channels may not be started or stopped by accesses to the control word
while parameter blocks are being transferred. The system must be in a de-
fined state before parameter blocks are transferred.
An example is shown below.
--
²
Timer
²
operating mode
-- Transmission of the 1st parameter block from DB 20
-- The CM35 has the module start address 128.
Assignment of the
I/O address area
Use of the consis-
tency bit
Transmission of
parameter blocks
Data Communication with the CM35
Summary of Contents for SIMATIC CM35
Page 1: ...SIMATIC Counter Module CM35 Manual Release 06 2000 ...
Page 9: ...vi CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Table of Contents ...
Page 10: ...1 1 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Product Overview 1 ...
Page 20: ...2 1 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Function Description 2 ...
Page 23: ...2 4 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Function Description ...
Page 47: ...3 24 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Commissioning ...
Page 48: ...4 1 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Data Communication with the CM35 4 ...
Page 70: ...5 1 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Pulse Counter Operating Mode 5 ...
Page 98: ...7 1 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Timer Operating Mode 7 ...
Page 112: ...8 1 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Positioning Operating mode 8 ...
Page 131: ...8 20 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Positioning Operating mode ...
Page 133: ...A 2 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Literature ...
Page 134: ...B 1 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 EC Declaration of Conformity B ...
Page 135: ...B 2 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 EC Declaration of Conformity ...
Page 141: ...Glossary 6 CM35 Counter Module 4 J31069 D0416 U001 A5 7618 Glossary ...