WAGO 750-640 User manual

Fieldbus Independent
I/O Modules
RTC Module
750-640
Manual
Version 1.0.2

ii • General
WAGO-I/O-SYSTEM 750
I/O-Modules
Copyright 2006 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.
WAGO Kontakttechnik GmbH & Co. KG
Hansastraße 27
D-32423 Minden
Phone: [phone] – 0
Fax: [phone] – 1 69
E-Mail: [email protected]
Web: http://www.wago.com
Technical Support
Phone: [phone] – 5 55
Fax: [phone] – 85 55
E-Mail: [email protected]
Every conceivable measure has been taken to ensure the correctness and com-
pleteness of this documentation. However, as errors can never be fully ex-
cluded, we would appreciate any information or ideas at any time.
E-Mail: [email protected]
We wish to point out that the software and hardware terms as well as the
trademarks of companies used and/or mentioned in the present manual are
generally trademark or patent protected.

Content •3
WAGO-I/O-SYSTEM 750
I/O-Modules
Content
1Important Comments ................................................................................. 5
1.1 Legal Principles........................................................................................5
1.1.1 Copyright ............................................................................................. 5
1.1.2 Personnel Qualification ....................................................................... 5
1.1.3 Intended Use ........................................................................................ 5
1.2 Symbols .................................................................................................... 6
1.3 Number Notation...................................................................................... 6
1.4 Safety Notes ............................................................................................. 7
1.5 Scope ........................................................................................................ 7
2I/O Modules ................................................................................................. 8
2.1 Special Modules ....................................................................................... 8
2.1.1 750-640 [RTC Module] ....................................................................... 8
2.1.1.1 View................................................................................................ 8
2.1.1.2 Description...................................................................................... 8
2.1.1.3 Display Elements ............................................................................ 9
2.1.1.4 Schematic Diagram....................................................................... 10
2.1.1.5 Technical Data .............................................................................. 11
2.1.1.6 Functional Description.................................................................. 12
2.1.1.6.1 Date and Time .......................................................................... 12
2.1.1.6.2 Configuration Data................................................................... 13
2.1.1.6.2.1 Timer Configuration (T0 ... T31) ........................................ 13
2.1.1.6.2.1.1 Example .......................................................................... 14
2.1.1.6.2.2 Auto ..................................................................................... 15
2.1.1.6.2.3 TimeZone ............................................................................ 15
2.1.1.6.2.4 DstBias ................................................................................ 15
2.1.1.6.2.5 Password.............................................................................. 15
2.1.1.6.2.6 Init........................................................................................ 15
2.1.1.6.2.7 Antenna................................................................................ 16
2.1.1.6.3 Service Data ............................................................................. 16
2.1.1.6.3.1 Hours Run and Maintenance Interval..................................17
2.1.1.7 Process Image ............................................................................... 17
2.1.1.7.1 Structure of the Input Data and Output Data ...........................18
2.1.1.7.2 Access to Module Data ............................................................ 19
2.1.1.8 RTC Module Functions................................................................. 20
2.1.1.8.1 Function Overview................................................................... 20
2.1.1.8.2 Example of Function Call ........................................................ 22
2.1.1.8.2.1 Data Reading ....................................................................... 22
2.1.1.8.2.2 Data Receiving .................................................................... 22
2.1.1.8.2.3 Writing Data in Safe Configuration Area............................ 23
2.1.1.9 Connection Examples ................................................................... 26
2.1.1.9.1 Antenna Supply with 24 V....................................................... 26
2.1.1.9.2 Antenna Supply with 3 V via External Power Supply............. 26
3Attachment ................................................................................................ 27
3.1 Functions ................................................................................................ 27

4 •Content
WAGO-I/O-SYSTEM 750
I/O-Modules
3.1.1 Function Overview ............................................................................ 27
3.1.2 Function Overview sorted by ID ....................................................... 29
3.1.3 Function Overview sorted by Function ............................................. 31
3.1.4 Function Reference............................................................................ 33
3.1.4.1 IDLE, 0x00 ................................................................................... 33
3.1.4.2 GET_TOD100, 0x01..................................................................... 34
3.1.4.3 GET_CURRENT_TOD100, 0x09 ................................................ 35
3.1.4.4 GET_TOD, 0x02........................................................................... 36
3.1.4.5 GET_CURRENT_TOD, 0x0A .....................................................37
3.1.4.6 GET_DT, 0x03.............................................................................. 38
3.1.4.7 GET_CURRENT_DT, 0x0B ........................................................ 39
3.1.4.8 GET_UTC, 0x04........................................................................... 40
3.1.4.9 GET_CURRENT_UTC, 0x0C...................................................... 41
3.1.4.10 GET_DATE, 0x05 ........................................................................ 42
3.1.4.11 GET_CURRENT_DATE, 0x0D...................................................43
3.1.4.12 GET_MS, 0x06 ............................................................................. 44
3.1.4.13 GET_WEEKDAY, 0x07...............................................................45
3.1.4.14 SET_DT, 0x0F .............................................................................. 46
3.1.4.15 GET_CHANNEL, 0x10................................................................ 47
3.1.4.16 SET_CHANNEL, 0x11 ................................................................ 48
3.1.4.17 CLEAR_CHANNEL, 0x12 .......................................................... 49
3.1.4.18 GET_AUTO, 0x13........................................................................ 50
3.1.4.19 SET_AUTO, 0x14 ........................................................................ 51
3.1.4.20 GET_ADDR, 0x20........................................................................52
3.1.4.21 SET_ADDR, 0x21 ........................................................................ 53
3.1.4.22 GET_OPH, 0x30........................................................................... 54
3.1.4.23 GET_OPH_INC (auto incremental), 0x31 ...................................55
3.1.4.24 SET_OPH, 0x32............................................................................ 56
3.1.4.25 SET_OPH_INC (auto incremental), 0x33 .................................... 57
3.1.4.26 GET_SERVICE_FLAGS, 0x34.................................................... 58
3.1.4.27 GET_CNF, 0x38 ........................................................................... 59
3.1.4.28 GET_CNF_INC (auto incremental), 0x39.................................... 60
3.1.4.29 SET_CNF, 0x3A........................................................................... 61
3.1.4.30 SET_CNF_INC (auto incremental), 0x3B.................................... 62
3.1.4.31 GET_DIAG, 0xFF ........................................................................ 63

Important Comments •5
Legal Principles
WAGO-I/O-SYSTEM 750
I/O-Modules
1 Important Comments
To ensure fast installation and start-up of the units described in this manual,
we strongly recommend that the following information and explanations are
carefully read and abided by.
1.1 Legal Principles
1.1.1 Copyright
This manual is copyrighted, together with all figures and illustrations
contained therein. Any use of this manual which infringes the copyright
provisions stipulated herein, is not permitted. Reproduction, translation and
electronic and photo-technical archiving and amendments require the written
consent of WAGO Kontakttechnik GmbH & Co. KG. Non-observance will
entail the right of claims for damages.
WAGO Kontakttechnik GmbH & Co. KG reserves the right to perform
modifications allowed by technical progress. In case of grant of a patent or
legal protection of utility patents all rights are reserved by WAGO
Kontakttechnik GmbH & Co. KG. Products of other manufacturers are always
named without referring to patent rights. The existence of such rights can
therefore not be ruled out.
1.1.2 Personnel Qualification
The use of the product detailed in this manual is exclusively geared to
specialists having qualifications in PLC programming, electrical specialists or
persons instructed by electrical specialists who are also familiar with the valid
standards. WAGO Kontakttechnik GmbH & Co. KG declines all liability
resulting from improper action and damage to WAGO products and third party
products due to non-observance of the information contained in this manual.
1.1.3 Intended Use
For each individual application, the components supplied are to work with a
dedicated hardware and software configuration. Modifications are only
permitted within the framework of the possibilities documented in the
manuals. All other changes to the hardware and/or software and the non-
conforming use of the components entail the exclusion of liability on part of
WAGO Kontakttechnik GmbH & Co. KG.
Please direct any requirements pertaining to a modified and/or new hardware
or software configuration directly to WAGO Kontakttechnik GmbH & Co.
KG.

6 •Important Comments
Symbols
WAGO-I/O-SYSTEM 750
I/O-Modules
1.2 Symbols
Danger
Always abide by this information to protect persons from injury.
Warning
Always abide by this information to prevent damage to the device.
Attention
Marginal conditions must always be observed to ensure smooth operation.
ESD (Electrostatic Discharge)
Warning of damage to the components by electrostatic discharge. Observe
the precautionary measure for handling components at risk.
Note
Routines or advice for efficient use of the device and software optimization.
More information
References on additional literature, manuals, data sheets and INTERNET
pages
1.3 Number Notation
Number Code Example Note
Decimal 100 normal notation
Hexadecimal 0x64 C notation
Binary '100'
'0110.0100'
Within ',
Nibble separated with dots

Important Comments •7
Safety Notes
WAGO-I/O-SYSTEM 750
I/O-Modules
1.4 Safety Notes
Warning
Switch off the system prior to working on bus modules!
In the event of deformed contacts, the module in question is to be replaced, as
its functionality can no longer be ensured on a long-term basis.
The components are not resistant against materials having seeping and
insulating properties. Belonging to this group of materials is: e.g. aerosols,
silicones, triglycerides (found in some hand creams).
If it cannot be ruled out that these materials appear in the component
environment, then additional measures are to be taken:
- installation of the components into an appropriate enclosure
- handling of the components only with clean tools and materials.
Attention
Cleaning of soiled contacts may only be done with ethyl alcohol and leather
cloths. Thereby, the ESD information is to be regarded.
Do not use any contact spray. The spray may impair the functioning of the
contact area.
The WAGO-I/O-SYSTEM 750 and its components are an open system. It
must only be assembled in housings, cabinets or in electrical operation
rooms. Access must only be given via a key or tool to authorized qualified
personnel.
The relevant valid and applicable standards and guidelines concerning the
installation of switch boxes are to be observed.
ESD (Electrostatic Discharge)
The modules are equipped with electronic components that may be destroyed
by electrostatic discharge. When handling the modules, ensure that the
environment (persons, workplace and packing) is well grounded. Avoid
touching conductive components, e.g. gold contacts.
1.5 Scope
This manual describes the Special Module 750-640
RTC Module of the modular WAGO-I/O-SYSTEM 750.
Handling, assembly and start-up are described in the manual of the Fieldbus
Coupler. Therefore this documentation is valid only in the connection with the
appropriate manual.

8 •750-640 [RTC Module]
View
WAGO-I/O-SYSTEM 750
I/O-Modules
2 I/O Modules
2.1 Special Modules
2.1.1 750-640 [RTC Module]
Real Time Clock Module
2.1.1.1 View
15
26
37
48
13 14
C
D
B
A
750-640
Clock
V_Ant
-out
V_Ant
+in
V_Ant
-in
V_Ant
+out
Signal
DCF77
24 V out
24Vin
Power jumper contacts
Data contacts
Shield
Ground
Fig. 2.1.1-1: View g064000e
2.1.1.2 Description
The RTC module 750-640 provides the higher-level control system with the
actual time. The time continues to run in the event of a power failure. Once the
module is switched on, about one hour is required for the integrated backup
capacitor to be fully charged.
When an external antenna is connected, the clock can be set using the time
signal from DCF77, WWVB or MSF. The antenna can be supplied directly via
the module. Connecting an external antenna to operate the RTC module is not
absolutely necessary.
With its 32 channels, the integrated time switch clock function makes it easier
for the control unit to process time-triggered actions. The module also counts
the power-on time of the 32 channels.
An external antenna is connected to both V_ANT+ out and V_ANT- out as
well as to the clock.
Supplying the antenna is done via the V_ANT+ in and V_ANT- in terminals.
Synchronizing the clock is done at the clock input using the time signal from
DCF77 or WWVB. The module is set by default to receive the DCF77 signal.

750-640 [RTC Module] •9
Display Elements
WAGO-I/O-SYSTEM 750
I/O-Modules
The shield (screen) is directly connected to the DIN rail. A capacitive
connection is made automatically when the module is snapped onto the DIN
rail.
The status of the antenna input signal is indicated with a green LED.
An optocoupler is used for electrical isolation between the bus and the field
side.
Any configuration of the specialty modules is possible when designing the
fieldbus node. Grouping of module types is not necessary.
The field side supply voltage of 0 V and 24 V to downstream I/O modules is
derived from adjacent I/O modules or from a supply module. The supply
voltage for the field side is made automatically through the individual I/O
modules by means of power jumper contacts.
Warning
The maximum current of the internal power jumper contacts is 10 A. When
configuring the system it is important not to exceed the maximum/sum
current. However, if such a case should occur, another supply module must
be added.
The RTC module 750-640 can be used with all couplers / controllers of the
WAGO-I/O-SYSTEM 750 (except for the economy types 750-320, -323, -324
and –327).
2.1.1.3 Display Elements
LED Description State Function
off No antenna signal
Fast blinking No or faulty antenna signal
Blinking with
1 Hz
Antenna signal is present, but not
yet a correct telegram received
13 14
C
D
B
A
A
Fig. 2.1.1-2:
Display Elements
g063002x
green Antenna
signal
on Antenna signal receiver is error
free

10 •750-640 [RTC Module]
Schematic Diagram
WAGO-I/O-SYSTEM 750
I/O-Modules
2.1.1.4 Schematic Diagram
Shield
Ground
1
2
3
4
5
6
7
8
750-640
Clock
V_Ant +out
24 V out
24Vin
V_Ant -out
V_Ant +in
V_Ant -in
Fig. 2.1.1-3: Schematic Diagram g064001e

750-640 [RTC Module] •11
Technical Data
WAGO-I/O-SYSTEM 750
I/O-Modules
2.1.1.5 Technical Data
Module Specific Data
Current consumption typ.
(internal)
< 20 mA
Voltage via power jumper
contacts
DC 24 V (-15%...+20%)
Clock
Accuracy (+25°C) < 1min/month
Accuracy (+10...+40°C) < 2min/month
Accuracy (-25...+85°C) < 7min/month
Drift < 2min/year
Buffer length > 6 days
Clock Timer
Number of channels 32
Switching points 32 (per 32 channels on/off)
DCF77 Input
Signal voltage (0) -24 ... +1 V
Signal voltage (1) 3 ... 24 V
Idle run voltage DC 4 V
Input filter 10 ms
Input current typ. < 5 mA (at 24 V)
< 1 mA (at 5 V)
Supply voltage Vant, in DC 5 ... 24 V
Isolation 500 V (field / system)
Input current typ. (field) 11 mA + load
Internal data size 1 x 40 bit data (in/out) (5 byte user data)
1 x 8 bit control / status (optional)
Weight ca 55 g
Approvals (cf. Chapter 2.2 of the Coupler/Controller Manual)
CULUS (UL508)
Conformity Marking

12 •750-640 [RTC Module]
Functional Description
WAGO-I/O-SYSTEM 750
I/O-Modules
More Information
Detailed references to the approvals are listed in the document "Overview
Approvals WAGO-I/O-SYSTEM 750", which you can find on the CD ROM
ELECTRONICC Tools and Docs (Item-No.: 0888-0412)
or in the internet under:
www.wago.com !Documentation !WAGO-I/O-SYSTEM 750 !
System Description
2.1.1.6 Functional Description
The RTC module provides many functions to read and set date and time,
configuration data like time settings, time zone or antenna selection as well as
service data such as run hours and maintenance intervals.
•••
•••
1 2 3 4 29 30 31 32
•••
1 2 3 4 29 30 31 32
••• GET_SERVICE_FLAGS
GET_CHANNEL
SET_CHANNEL
CLEAR_CHANNEL
•••
GET_AUTO
SET_AUTO
1:n
1:1
1:1
1:1
1:1
1:1
1:1
1234 29303132
GET_CNF
SET_DT
•••
GET_OPH
SET_OPH
1:1
GET_DT
SET_CNF
1:1
first-time appearance
last-time appearance
time between 2 swtch.points
mask for weekdays
switching point 1
channel
1 … 32 (on)
channel
1 … 32 (off)
first-time appearance
last-time appearance
time between 2 swtch.points
mask for weekdays
switching point 32
channel
1 ... 32 (on)
channel
1 ... 32 (off)
timer
operation
mode
channel
elapsed
hour-meter
serviceflags
operating hours
service intervall
elapsed hour-
meter 1
operating hours
>=
service intervall
operating hours
service intervall
elapsed hour-
meter 32
operating hours
>=
service intervall
Fig. 2.1.1-4: Overview of RTC functions g064005e
The call and the parameters of the individual functions are described in the
attachment.
2.1.1.6.1 Date and Time
The following functions are used to get the current date and time:
GET_TOD100, GET_CURRENT_TOD100, GET_TOD,
GET_CURRENT_TOD, GET_DT, GET_CURRENT_DT, GET_UTC,
GET_CURRENT_UTC, GET_DATE, GET_CURRENT_DATE, GET_MS,
GET_WEEKDAY. The functions GET_CURRENT_.... are used to get the

750-640 [RTC Module] •13
Functional Description
WAGO-I/O-SYSTEM 750
I/O-Modules
data continuously.
Using the SET_DT function, the date and time can be set manually.
2.1.1.6.2 Configuration Data
The configuration data of the RTC module can be accessed using the
GET_CNF, GET_CNF_INC, SET_CNF and SET_CNF_INC functions. The
address offset of the relevant entry must be previously set using the
SET_ADDR function. When the data is accessed via the GET_CNF_INC or
SET_CNF_INC functions, the address offset is automatically increased by 4
bytes after the read or write operation is complete. For a write access with
SET_CNF and SET_CNF_INC, the valid password must previously be
entered at address offset 0x0310.
The configuration data is structured as follows:
Offset Function Description Length
0x0000 T0 Configuration Timer 0 24
0x0018 T1 Configuration Timer 1 24
0x0030 T2 Configuration Timer 2 24
... ... ... ...
0x02E8 T31 Configuration Timer 31 24
0x0300 Auto Auto/manual for each channel (0 = auto) 4
0x0308 TimeZone Offset for time zone (seconds) 4
0x030C DstBias Offset for summer time (daylight saving time, seconds) 4
0x0310 Password 0x3EA8D0F1 4
0x0314 Init 0x1F0D8AE3 4
0x031C Antenna Selection of the time signal transmitter 4
2.1.1.6.2.1 Timer Configuration (T0 ... T31)
The module has a timer function with 32 switching points and 32 output
channels. Any of the 32 channels can be switched on or off at each switching
point. All switching points are cyclically recurrent. The actual status of the
switching channels can be queried via the GET_CHANNEL function and can
be changed manually via the SET_CHANNEL and CLEAR_CHANNEL
functions.

14 •750-640 [RTC Module]
Functional Description
WAGO-I/O-SYSTEM 750
I/O-Modules
A switching point is defined using the following entries:
Offset Meaning Format Length Comment
0 First-time appearance DATE_AND_TIME 32 bit
4 Last appearance DATE_AND_TIME 32 bit 0 = not used
8 Time between two
switching points
DATE_AND_TIME 32 bit 0 = single event
12 Switched channels (on) Binary 32 bit Dominant *)
16 Switched channels (off) Binary 32 bit Recessive
20 Mask for weekdays Bit 0 = Mo ...
Bit 6 = So,
0 = every,
0x7F = every
8 bit
*) When a channel is accessed by two or more switching points, the point that is switching on
is enforced.
With an entry in the configuration data, the operation mode can be switched
into automatic or manual for each channel. The mode can also be selected via
the SET_AUTO function. When switching to the manual mode, the current
status is pending until it is set manually again. When switching to the
automatic mode, the current status (which may be set manually) is pending
until it is set anew automatically.
After power restoration, the last occurrence of all timers as well as the last
manual setting is taken into account, and the last theoretical status held during
the powerless time is set for each channel.
2.1.1.6.2.1.1 Example
Switching channels are used in an office for temperature and lighting control.
Channel 1 controls a temperature regulator, which has a binary signal as an
input, so that day and night time can be selected. On weekdays, the
temperature is increased at 06:00 and reduced at 18:00.
The heating is turned completely off during vacation days from 26.05.2003 to
13.06.2003.
Room lighting is controlled by channel 4. The controller queries the light
switch and the channel is set manually via SET_CHANNEL and
CLEAR_CHANNEL. If the employees forget to switch off the light in the
evening, this will be done automatically at 19:30.

750-640 [RTC Module] •15
Functional Description
WAGO-I/O-SYSTEM 750
I/O-Modules
Setting the timers is done as follows:
Timer Start Stop Interval On Off Days
1 01.01.1970
06:00:00 - 24h Channel 1 - Mo-Fr
2 01.01.1970
18:00:00 - 24h - Channel 1 Every
3 26.05.2003
06:00:01
13.06.2003
06:00:01 24h - Channel 1 Every
4 01.01.1970
19:30:00 - 24h - Channel 4 Every
The hexadecimal values are as follows:
Timer Start Stop Interval On Off Days
1 0x00005460 0x00000000 0x00015180 0x00000001 0x00000000 0x1F
2 0x0000FD20 0x00000000 0x00015180 0x00000000 0x00000001 0x00
3 0x3ED1AD61 0x3EE96861 0x00015180 0x00000000 0x00000001 0x00
4 0x00011238 0x00000000 0x00015180 0x00000000 0x00000008 0x00
2.1.1.6.2.2 Auto
The automatic mode of the relevant switching channel is switched off for each
bit set in Auto. The switching channel can only be changed using the
SET_CHANNEL and CLEAR_CHANNEL functions.
2.1.1.6.2.3 TimeZone
Time zone. For CET applies e.g. +1h = 3600s $
=
0x00000E10.
2.1.1.6.2.4 DstBias
For the transition from winter time to summer time, the content of DstBias
(Daylight Saving Time) is added to the TimeZone when the time is being
evaluated. This way, the transition can be performed without having to change
the time or time zone.
2.1.1.6.2.5 Password
Access to the configuration data is protected by means of a password.
Therefore, only write access is possible if 0x3EA8D0F1 has been entered.
2.1.1.6.2.6 Init
When 0x1F0D8AE3 is written to Init, all configuration data is overwritten
with zero.

16 •750-640 [RTC Module]
Functional Description
WAGO-I/O-SYSTEM 750
I/O-Modules
2.1.1.6.2.7 Antenna
This is how to select the decoder scheme for time signal reception.
Byte Bit Function
0 0 ... 1 0: No time signal reception
1: DCF77 Decoder activated
2: WWVB Decoder activated
0 2 DCF77 Polarity reversed
0 = Low-active
1 = High-active
Note on setting the time zone and summer time using different antennas:
• The DCF77 transmitter sends CET (Central European Time) or CEST
(Central European Summer Time), the summer time setting (DstBias)
remains set to zero. The time zone for Germany is 0.
• The WWVB transmitter sends in UTC. If the module is operated at the US
east coast (Eastern Time) for example, an offset of 5 hours (0xFFFFB9B0)
must be entered in the TimeZone. The transition from winter time to
summer time is done using a status bit within the time telegram. By setting
this bit, one more hour will be transmitted by the module. Within the
module, the transition is always performed at 00:00.
2.1.1.6.3 Service Data
Getting or setting the "up to now accumulated run time and maintenance
interval" is done using the GET_OPH, GET_OPH_INC, SET_OPH and
SET_OPH_INC functions for each channel. The address offset of the relevant
hours-run meter must previously be set using the SET_ADDR function. When
the data is accessed via the GET_CNF_INC or SET_CNF_INC functions, the
address offset is automatically increased by 4 bytes after the read or write
operation is complete. For a write access with SET_CNF and SET_CNF_INC,
the valid password must previously be entered at address offset 0x0310 .
The hours-run meter is stopped in the event of a power failure independent of
the status of the relevant channel.
Offset Function Length
0x0000 Hours-run meter channel 0 8
0x0008 Hours-run meter channel 1 8
0x0010 Hours-run meter channel 2 8
... ... ...
0x00F8 Hours-run meter channel 31 8

750-640 [RTC Module] •17
Process Image
WAGO-I/O-SYSTEM 750
I/O-Modules
2.1.1.6.3.1 Hours Run and Maintenance Interval
The hours run meter's data contains the "up to now accumulated hours run" as
well as the set maintenance interval as shown below:
Offset Description Length
0x0000 Up to now accumulated hours run (seconds) 4
0x0004 Maintenance interval (seconds) 4
The relevant service flag is set when the number of "up to now accumulated
hours run" exceeds the specified maintenance interval for one switching
channel. The GET_SERVICE_FLAGS function is used to get the status of the
service flags.
2.1.1.7 Process Image
Using the RTC module 750-640, a 6-byte input and output process image
maximum can be transferred to the fieldbus coupler/controller via one logical
channel. The data received by the transmitter is stored in 4 input and output
bytes (D0 ... D3). 1 control byte (C) and 1 status byte (S) are used to control
the function call. 1 command byte (ID) is used to select and acknowledge the
function to be executed.
Attention
The representation of the process data of some I/O modules or their variations
in the process image depends on the fieldbus coupler/controller used. Please
take this information as well as the particular design of the respective
control/status bytes from the section "Fieldbus Specific Design of the Process
Data" included in the description concerning the process image of the
corresponding coupler/controller.
The input bytes constitute the memory area of the data to be transmitted by the
module. The data to be transmitted to the module is written into the output
bytes.
Input Data Output Data
S Status byte C Control byte
ID Function selection ID ID Function selection ID
D0 Data byte 0 D0 Control byte 0
D1 Data byte 1 D1 Control byte 1
D2 Data byte 2 D2 Control byte 2
D3 Data byte 3 D3 Control byte 3

18 •750-640 [RTC Module]
Process Image
WAGO-I/O-SYSTEM 750
I/O-Modules
The control byte includes the following bits:
Control Byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 0 0 0 0 TR
TR Transmit Request, request to send (toggle flag)
0 reserved (constant must be set to zero)
The status byte contains the following bits:
Status Byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 0 0 0 0 TA
TA Transmit Acknowledge, transmission confirmation (toggle flag)
0 reserved (this value is always 0)
2.1.1.7.1 Structure of the Input Data and Output Data
Function Request
Byte 272
62 52 42 32 22 12 0
C 0 0 0 0 0 0 0 TR
ID Opcode
D0 Request parameter byte 0
D1 Request parameter byte 1
D2 Request parameter byte 2
D3 Request parameter byte 3
0 reserved (value must always be 0).
TR Transmit-Request
(toggle flag)
A changing is followed by a function call.
Opcode Instruction code of
the function call
A changing is followed by a function call.

750-640 [RTC Module] •19
Process Image
WAGO-I/O-SYSTEM 750
I/O-Modules
Function Response
Byte 272
62 52 42 32 22 12 0
S 0 0 0 0 0 0 0 TA
ID Opcode (mirrored)
D0 Response parameter byte 0
D1 Response parameter byte 1
D2 Response parameter byte 2
D3 Response parameter byte 3
X reserved (value is always 0 and is not evaluated)
TA Transmit-
Acknowledge
(toggle flag)
A function call is receipted with a changing.
Opcode Mirrored
instruction code of
the function call
A function call is receipted with a changing.
2.1.1.7.2 Access to Module Data
The user first writes the call parameters, and then the opcode and toggle flag.
Once the opcode or toggle flag have changed, the output data is interpreted as
complete function call by the RTC module so that the function can be
executed. The function response is stored in the input data.
After the function has been executed, the opcode and toggle flags are mirrored
by the RTC module. This way, the user knows that his request has been
processed and the result is in the input data.
The toggle flag is necessary so that two function calls using the same opcode
(even though different parameters may be used) can be performed one directly
after the other.

20 •750-640 [RTC Module]
RTC Module Functions
WAGO-I/O-SYSTEM 750
I/O-Modules
2.1.1.8 RTC Module Functions
2.1.1.8.1 Function Overview
ID Function Description Site
0x00 IDLE No function call 33
Date and Time Functions
0x01 GET_TOD100 Getting time in 100µs since 00:00 34
0x09 GET_CURRENT_TOD100 Getting time in 100µs since 00:00,
(consecutively) 35
0x02 GET_TOD Getting time in milliseconds since 00:00 36
0x0A GET_CURRENT_TOD Getting time in milliseconds since 00:00
(consecutively) 37
0x03 GET_DT Getting time in seconds since 1.1.1970
00:00 38
0x0B GET_CURRENT_DT Getting time in seconds since 1.1.1970
00:00, (consecutively) 39
0x04 GET_UTC Getting time in seconds since 1.1.1970
00:00 (UTC) 40
0x0C GET_CURRENT_UTC Getting time in seconds since 1.1.1970
00:00 (UTC), (consecutively) 41
0x05 GET_DATE Getting date in seconds since 1.1.1970
00:00 42
0x0D GET_CURRENT_DATE Getting date in seconds since 1.1.1970
00:00, (consecutively) 43
0x06 GET_MS Getting millisecond part of the last
GET_DT request 44
0x07 GET_WEEKDAY Getting weekday 45
0x0F SET_DT Setting time in seconds since 1.1.1970
00:00 46
Timer Functions
0x10 GET_CHANNEL Getting switching states of the switching
channels 47
0x11 SET_CHANNEL Setting switching states of the switching
channels 48
0x12 CLEAR_CHANNEL Clearing switching states of the switching
channels 49
0x13 GET_AUTO Getting automatic states of the switching
channels 50
0x14 SET_AUTO Setting automatic states of the switching
channels 51