Siemens SMP16-SFT251 Parts list manual

SICOMP Industrial Microcomputer
(4)J31069-D2090-U001-A1-7618
Technical Description
Order number: 6AR1930-4AA06-2AA0 April 2003
SMP16-SFT251
Order number: 6AR1304-0EA00-0AA0
Counter board with two 32-bit incremental/pulse counters

SMP16-SFT251
©Siemens AG 2003, All Rights Reserved
2(4)J31069-D2090-U001-A1-7618
Product History of the Technical Description
Revision 1) Record of Changes Date
A0 First edition 03/00
A1 Control Register 1 and 2, Chapter 6.4.3 and 6.4.4 04/03
1) Corresponds to the 4th block of digits of the drawing number in the footer
Explanation of Notation
* An asterisk behind the signal name indicates a low-active signal (e.g., IOR*).
/ A slash between two signal names separates two level-dependent functions of one signal.
Example: C/D* means Command for high level and Data for low level.
x Bits marked with an x in the register descriptions are irrelevant.
– Connections indicated with a dash in a connector assignment table are reserved (i.e., bus or
I/O interface).
Signal Special signals not included in these specifications are indicated in bold print in the signal
assignment tables and then explained (e.g., AMSEOP).
Notes:
SICOMP® is a registered trademark of Siemens AG.
IBM AT® and IBM PC® are registered trademarks of the International Business Machines Corp.
INTEL® is a registered trademark of the INTEL Corp.
MS-DOS®, Windows® and Windows NT® are registered trademarks of Microsoft.
All other designations used in this documentation may be trademarks whose use by third parties for their own purposes may
violate the rights of the owner.
Passing on and reproduction of this document, as well as utilization and communication of its contents is prohibited unless
expressly authorized. Offenders will be liable for damages. All rights reserved, particularly in the event a patent is granted or a
utility model is registered.
No responsibility is assumed for circuits, descriptions and tables contained in this document concerning freedom from rights of
third parties. Information in the technical descriptions specifies products but does not guarantee characteristics. The product
described in this documentation may require licensing. Questions should be directed to your local Siemens office.
Availability and technical modifications subject to change without prior notice. ES43/Kt/WW8.0/VS5.0/A4

SMP16-SFT251
©Siemens AG 2003, All Rights Reserved
(4)J31069-D2090-U001-A1-7618 3
Safety Notes for SICOMP Boards
ESD protection measures
Caution
When handling boards and other components carrying this symbol, always adhere to
ESD protection guidelines (Electrostatic Sensitive Devices).
• Never touch the boards unless required work makes this absolutely necessary.
• When working with the boards, use a conductive and grounded work surface.
• Wear a grounding bracelet.
• Never touch the pins, connections or printed circuits of the boards.
• Never permit the boards or components to be touched by chargeable objects (e.g., synthetic
materials).
• Keep the boards or components at least 10 cm away from CRT units and television sets.
• Leave the boards in their special packaging until they are needed. When registering boards, etc.
do not remove the boards from their packaging or touch them.
• Boards may only be installed or removed when the voltage is off.
Wiring of Bus Backplanes
System-related signal wiring on SICOMP board systems is performed with wrap connections. The
power supply cables are bundled together with cable binders. These cables are equipped with plug-in
or screw connections.
Caution:
All signal wiring (the interrupt signal lines in particular) must be of the appropriate design and kept as
short as possible. When longer interrupt signal lines cannot be avoided, twisted pair wiring must be
used.
Related SICOMP SMP16 Literature
For more information on installing and handling SICOMP boards, see "SICOMP IMC system manual".

SMP16-SFT251
©Siemens AG 2003, All Rights Reserved
4(4)J31069-D2090-U001-A1-7618
Table of Contents
1 Initial Startup 7
1.1 Preparing for Software Configuration 7
1.2 Wiring the I/O 9
2 Features 10
2.1 Characteristics 10
2.2 Front LEDs 11
2.3 Operational Values 12
2.4 Physical Characteristics of the Encoder Signals 13
2.5 Time Requirements for the Input Signals 13
2.5.1 Encoder Signals 13
2.5.2 Frequency and Pulse Width Measurement 14
2.5.3 Special Signals 14
2.6 Time Relationships of the 24 V Interface 15
2.7 Ambient Conditions 16
2.8 Recommended Accessories 16
3 Interfaces 17
3.1 Overview of the Interfaces 17
3.2 Pin Connector X2 to SMP16 Bus 18
3.2.1 Signals for the Daisy Chain 18
3.2.2 Other Special Signals 19
3.3 I/O Connectors X3 and X4 20
3.4 Interface Switches S1 and S2 21
4 Configuration with Software 22
5 Compatibility with SMP-E251 24
6 Programming the Board 25
6.1 Register Overview 25
6.2 Reset Reactions 28
6.3 Function Description 29
6.3.1 Reading the Counter Status 29
6.3.2 Loading the Counters 29
6.3.3 Position Acquisition via Shaft Encoder Edge Evaluation 30
6.3.4 Position Acquisition with Hardware Support 32
6.3.5 Position Acquisition without Hardware Support 33
6.3.6 Frequency and Pulse Width Measurement 35
6.3.7 Overview of the Commands 38

SMP16-SFT251
©Siemens AG 2003, All Rights Reserved
(4)J31069-D2090-U001-A1-7618 5
6.3.8 Extra Inputs ZS00 to ZS30 (Counting Channel 0) or ZS01 to ZS31 (Counting
Channel 1) 40
6.3.9 The Universal Registers 40
6.3.10 The Clear Functions 41
6.3.11 The Hysteresis Functions 42
6.3.12 Switching the Two Counting Channels in Parallel 43
6.3.13 Interrupts 43
6.4 Description of the Registers 44
6.4.1 Mode Registers, Channel 0 and Channel 1 44
6.4.2 Control Register 0 45
6.4.3 Control Register 1 (16-Bit Register, Addresses x and x+1) 46
6.4.4 Control Register 2 (16-Bit Register, Addresses x+2 and x+3) 47
6.4.5 Interrupt Mask (16-Bit Register, Addresses x+4 and x+5) 49
6.4.6 Interrupt Register, Channel 0 and Channel 1 50
6.4.7 Status Register 0 51
6.4.8 Status Register 1 52
6.4.9 Status Register 2 (16-Bit Register, Addresses x+6 and x+7) 53
6.4.10 Clear Register (16-Bit Register, Addresses x+6 and x+7) 55
6.5 Times 57
6.5.1 Read/Write Accesses 57
6.5.2 Board Commands 57
7 Sample Programs 58
7.1 Position Acquisition with Hardware Support (BG_Mode = "0") 58
7.2 Position Acquisition without Hardware Support (BG_Mode = "1") 60
7.3 Frequency and Pulse Width Measurement without Using the Zero-Marking-
Pulse Input 61

SMP16-SFT251
©Siemens AG 2003, All Rights Reserved
6(4)J31069-D2090-U001-A1-7618

SMP16-SFT251 Initial Startup
©Siemens AG 2003, All Rights Reserved
(4)J31069-D2090-U001-A1-7618 7
1 Initial Startup
The primary steps involved in the initial startup of the board are listed below.
1. Software configuration. See chapters 1.1 and 4 for more information.
Attention:
Chip select channel 0 must be enabled for the board.The other channels can be enabled or
disabled depending on the particular application. The ASBIC channel must be disabled.
2. Wiring I/O devices. See chapter 1.2 or 2.8 for more information.
1.1 Preparing for Software Configuration
The configuration of the board with the SMP16-AKO auto configuration software (see chapter 2.8) can
be performed directly in the target system or in a separate generation system. In addition, the
configuration can be performed in a separate system, but the board can still be configured in the target
system.
In all cases, the board must be installed in an SMP16 bus system with daisy chain connection at the
time of programming.
Configuration in the target system
Requirements on the Target System
Required hardware • SICOMP IMC AT CPU
• SMP16 bus backplane with daisy chain
Required software • Windows 95
• SMP16-AKO V2.0
Configuration in the target system, generation of the configuration in separate
system
Requirements on the Target System Requirements on the Generation
System
Required hardware 1) • SICOMP IMC AT CPU
• SMP16 bus backplane with daisy
chain
• PC-AT (e.g., workplace computer or
laptop)
Required software • RMOS or MS-DOS
• AKO start program
• Windows 95 or Windows NT
• SMP16-AKO V2.0
1) In addition, there must be a way to transfer the generated configuration file (i.e., STARTUP.SKD) to the
target system. Some examples are listed below.
- Serial connection via zero modem cable (is supported by AKO start program)
- Floppy disk drives on both systems
- LAN connection

Initial Startup SMP16-SFT251
©Siemens AG 2003, All Rights Reserved
8(4)J31069-D2090-U001-A1-7618
Configuration in a separate generation system
The board is installed in the generation system for configuration and then returned to the target
system afterwards.
Requirements on the Generation System
Required hardware • SICOMP IMC AT CPU
• SMP16 bus backplane with daisy chain
Required software • Windows 95
• SMP16-AKO V2.0
Daisy chaining for configuration via software
With SMP16-SYS403 bus backplanes with 5 or more slots, the daisy change connection is already
implemented electronically.
With the other bus backplanes, the slots of the software-configurable boards must be wired as shown
below.
cba
1
32 Board n
cba
1
Board 3
cba
1
Board 2
cba
1
Board 1
A
CEN (b11)
A
CDONE (b13)
32 32 32
Figure 1.1 Daisy chaining on the SMP16 bus backplane for configuration via software
The ACEN input of the first software configurable board in the chain of configuration remains open as
does the ACDONE output of the last board. All other ACDONE outputs must be connected with the
ACEN input of the next board. See chapter 3.2.1.

SMP16-SFT251 Initial Startup
©Siemens AG 2003, All Rights Reserved
(4)J31069-D2090-U001-A1-7618 9
1.2 Wiring the I/O
The differential control lines must be twisted in pairs (see chap. 3.3). The single-ended control lines
must be twisted with the related ground.
The shield must be applied (for HF) to both the board and the addressed I/O. To prevent equalizing
currents on the shield, an equipotential bonding conductor should be installed parallel to the signal
line.
Never install your control lines near strong interference (e.g., motors, relays, high-voltage or power
lines, thyristor controllers, power inverters and transmitters).
Also adhere to the information on electromagnetic compatibility contained in the SICOMP IMC system
manual under the chapter on ambient conditions.

Features SMP16-SFT251
©Siemens AG 2003, All Rights Reserved
10 (4)J31069-D2090-U001-A1-7618
2 Features
2.1 Characteristics
The SMP16-SFT251 is a counter board with two 32-bit counters. Its software is compatible with the
SMP-E251. It should be used instead of the SMP-E251.
The board has the following characteristics.
General
• Two 15-pin, sub D socket strips for connection of the I/O
• Free-convection ventilation
• EEPROM for identification and parameterization of the board
• Automatic configuration with "auto configuration" (see chap. 4)
• 5 V encoder power drawn from bus voltage (via fuse)
Functions per channel
• Position acquisition with connection of a two-track incremental encoder (single, double or
quadruple edge evaluation, max. track frequency of 2 MHz)
• One zero-marking-pulse latch register and 3 extra latch registers (can be triggered by digital
inputs) one of which can also be used as a comparator register
• Three digital, single-ended inputs (24 V) for triggering the extra latch registers or for generating
interrupts
• One digital, single-ended input (24 V) for resetting the counter or for triggering interrupts
• A comparator register can be used to trigger an alarm (interrupt, status bit) when a certain
counter state is reached and/or to reset the counter.
• Both the shaft encoder signals and the digital inputs of channel 0 can be assigned to channel 1.
This makes it possible to run both counters parallel to each other.
• Frequency or pulse width measurement with frequencies up to 4 MHz. Either level or edge-
control can be used to start the counter.
• The counting signals (A track and B track) and the zero marking pulse (N track) can be set with
DIP switches for either 24 V technology or for RS 422.
• The operating modes can be set separately for each channel.
The following block circuit diagram shows the logical organization of the board.