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1
SCYLAR INT 8
Communication description
MBus ID = 0x52
V1.1 changes reserved
Please Note:
The Hydrometer type SCYLAR INT8 and the
Siemens SITRANS FUE950 (7ME348 ones) are
identically!
Siemens A/S Flow Instruments
Nordborg, May 2011
- 411
Contents
1
INTRODUCTION .........................................................................................................................3
2
COMMUNICATION INTERFACES...............................................................................................3
•
RS-485: The module contains a 4-pole terminal strip with terminals marked D+, D-, Vcc and
GND. An external supply of 12Vdc ±5V <5W is needed for module. .............................................3
2.1
Communication priorities ........................................................................................................3
2.2
Telegram format .....................................................................................................................3
2.3
UARTBaud rates ....................................................................................................................3
2.4
Protocol layer.........................................................................................................................4
2.5
Connection set-up for optical ZVEI..........................................................................................4
2.6
Connection set-up for M-Bus / RS-485 / RS-232.....................................................................4
2.7
Addressing.............................................................................................................................4
2.7.1
Selection (secondary address).......................................................................................4
2.7.2
Deselection....................................................................................................................4
3
READING INTEGRATOR: ...........................................................................................................5
3.1
Standard data reading (Application Reset 0)...........................................................................5
3.2
Request response ..................................................................................................................5
3.3
Interpretation of data ..............................................................................................................5
3.3.1
Mbus Status Byte...............................................................................................................6
4
CUSTOMER TELEGRAM............................................................................................................6
5
DEFAULT TELEGRAM ................................................................................................................6
6
PARAMETRIZATION OF INTEGRATOR .....................................................................................7
6.1
Structure of instruction set......................................................................................................7
6.2
Date and time.........................................................................................................................7
6.3
New primary address..............................................................................................................7
6.4
Serial number / customer number...........................................................................................8
6.5
New accounting date 1...........................................................................................................9
6.6
New accounting date 2...........................................................................................................9
6.7
Pulse input counter 1..............................................................................................................9
6.8
Pulse input counter 2............................................................................................................10
6.9
Clearing operating days........................................................................................................10
6.10
Clearing error hour counter...............................................................................................10
6.11
Monthly values (last month)..............................................................................................11
6.11.1
Reading.......................................................................................................................11
6.11.2
Deleting .......................................................................................................................12
6.12
Deleting error log..............................................................................................................12
6.12.1
Reading.......................................................................................................................13
6.12.2
Setting read pointer......................................................................................................13
7
APPENDIX 1 .............................................................................................................................14
3
1 Introduction
The M-Bus (Meter Bus) is a European standard for remote reading of meters. It can be used for all
types of consumption meters and for various sensors and actuators.
This document does not deal with the M-Bus protocol in detail. Further information about this can be
found on the Internet at www.m-bus.com.
The RS-485 / RS-232 communication module is a serial interface for communication with external
devices, e.g. a PC.
2 Communication interfaces
SCYLAR INT 8 is equipped with five communication interfaces:
• Optical ZVEI
• M-BUS: M-Bus communication is over a two-wire line.
• Integrated radio function with 868MHz or 434MHz.
• RS-485: The module contains a 4-pole terminal strip with terminals marked D+, D-, Vcc and GND.
An external supply of 12Vdc
±
5V <5W is needed for module.
• RS-232: The module board contains a 3-pole terminal strip with terminals marked DAT, REQ and
GND (ground). This connection can be used in conjunction with the HYD cable adapter for PC
communication.
2.1 Communication priorities
Mutual influence of interfaces:
Interface Priority
Optical ZVEI 1
M-Bus 2
The M-Bus and RS-485, RS-232 interfaces can no longer be used at port 1 during optical
communication whereas port 2 can still be used for communication.
Port 2 is no longer being usable if integrated radio is active.
2.2 Telegram format
Communication complies with:
• IEC 870-5-1 Telecontrol equipment and systems; Transmission protocols; Section One -
Transmission frame formats.
2.3 UARTBaud rates
• M-Bus: 300 and 2400 baud, 8E1
automatic baud rate switching
• RS-485: 300 and 2400 baud, 8E1
• RS-232: 300 and 2400 baud, 8E1
• ZVEI optical: 2400 baud, 8E1
Interface Priority
Optical ZVEI 1
RS-485 / RS-232 2
4
2.4 Protocol layer
1. EN 13757-3
2. Data output
a) Variable protocol
b) “Least Significant Byte first” (mode 1) for multi-byte variables
c) All response telegrams also available for C1 errors
2.5 Connection set-up for optical ZVEI
To activate the optical ZVEI interface, a ‘0’ - ‘1’ bit pattern must be sent continuously at 2400 bauds for
2.2 s (= 480 bytes + $55 + 8 data bits + no parity + 1 stop bit). The actual communication can be
started after a pause of 11 to 330 bit times (2400 bauds).
2.6 Connection set-up for M-Bus / RS-485 / RS-232
After connection to the M-Bus/RS-485/RS-232, the TSS721 interface module is ready for reliable
communication.
2.7 Addressing
The integrator can be addressed using two addressing variants: with a logic address (primary address)
or by using a filter via its ex works identification (secondary address).
2.7.1 Selection (secondary address)
Request telegram: 68 0B 0B 68 53 FD 52 NN NN NN NN HH HH ID MM CS 16
Response: E5 (only if filter matches)
Structure of filter:
4-byte BCD NN (serial number) $F digit joker
2-byte HST HH (manufacturer code) $FF byte joker
1-byte ID (SCYLAR INT 7: $01) ID (ident. code) $FF joker
1-byte SMED MM (medium code) $FF joker
After selection, the integrator behaves as if it also had the primary address $FD and can therefore be
operated via the primary address $FD (response always with own primary address).
2.7.2 Deselection
Request telegram: 10 40 FD CS 16
Response: E5
To reliably end communication with the selected integrator, the integrator must be deselected or by
using a selective wrong filter.
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