Siemens PLT 112 · 2002
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Introduction
AS 488/TM
AS 488/TM systems for new plants exclusively with distributed
I/Os on the PROFIBUS-DP can also be installed in
SIMATIC PCS 7 cabinets. The SIMATIC S7/M7 installation
guidelines also apply to this version (see Catalog ST PCS7.A,
add-ons for the SIMATIC PCS 7 process control system).
Customers can select between two CPUs with different perfor-
mance levels for all design versions of the AS 488/TM:
• SIMATIC M7 CPU 486-3 with approx. 150% of the performance
of an AS 235
• SIMATIC M7 CPU 488-3 with approx. 270 - 300% of the perfor-
mance of an AS 235
A commissioning terminal based on PC/programming device
can be used for commissioning of the AS 488/TM. The terminal
is connected via a serial interface to the respective AS 488/TM
and offers the user the same GUI and syntax as known from the
AS 235. Because of the serial interface, not all HMI requirements
can be fulfilled. Furthermore, the commissioning terminal is not
suitable for operation/configuring of another AS using the
AS bus configuration channel.
PROGRAF AS+/NT is a convenient configuring tool for the
AS 488/TM automation systems. It is compatible with all AS 23x
systems. PROGRAF AS+/NT executes on an appropriate
PC/programming device with Windows NT/2000/XP operating
system and connection to the CS 275/PROFIBUS-TM system
bus. PROGRAF AS+/NT permits the creation of an online config-
uring station for AS 488/TM on the TELEPERM M system bus. On
the CS 275 system bus, PROGRAF AS+/NT additionally offers
HMI facilities corresponding to local operation of an AS 235.
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Highlights
Classification in the TELEPERM M system environment
Note:
Some of the communications partners/systems referred to below
are no longer available or no longer marketed. Reference to the
systems in the context "Classification in the TELEPERM M sys-
tem environment" does not permit any conclusions to be made
on their availability.
• Communications capability with existing systems and
I/O modules
All automation systems and operator systems of the
TELEPERM M process control system can be operated on the
CS 275 system bus. Only the current AS 488/TM and
PCS7/TM-OS systems as well as the AS 388/TM and OS 525
systems which are no longer actively marketed can be operat-
ed on the PROFIBUS-TM system bus. Communication specific
to TELEPERM M between bus stations on different system bus-
es is possible via a CS-L2 bridge. The AS 388/TM and
AS 488/TM systems respond on the system bus like an AS 235
system with compatible functions compared to the
PCS7/TM-OS or OS 525 system. The AS 488/TM automation
system can communicate with the following TELEPERM M sys-
tems:
- AS 388/TM or AS 488/TM automation systems on the
PROFIBUS-TM system bus, or AS 215, AS 220 S/K/H,
AS 230, AS 230 K, AS 235, AS 235 H, AS 235 K, AS 488/TM
on the CS 275 system bus
- OS 525, OS 525 Local or PCS7/TM-OS operation and moni-
toring systems on the PROFIBUS-TM system bus, or CS 275,
OS 252, OS 262, OS 265, OS 520 on the CS 275 system bus
- Engineering systems: personal computer with the
PROGRAF AS+/NT program package, personal computer or
ES 500 with the PROGRAF AS+ program package, on the
CS 275 or PROFIBUS-TM system bus
- Other systems
SIMATIC PCS 7, SIMATIC S7, SIMATIC S5 and systems from
other vendors via the DP bus PROFIBUS-DP, the coupling
bus PROFIBUS-AG/AG, or via a 3964R serial coupling with
TM module 6DS1 333-8AB.
• Limitations in communication
- The response of the AS 488/TM and AS 388/TM systems in a
homogeneous network with approved TELEPERM M stations
on the CS 275 or PROFIBUS-TM system bus (AS 235,
OS 525, PCS7/TM-OS etc.) maps the AS 235 system with the
exception of CD mode (e.g. for data formats and block
names on the bus). CD couplings (without acknowledgment)
for AKx/BKx blocks are not implemented in the AS 388/TM
and AS 488/TM systems. When carrying out migration or
when importing user structures, the CD couplings must there-
fore be removed prior to loading into the automation system.
Note
:
When communicating with other stations (e.g. systems from
other vendors) via the N-AT interface module on the CS 275,
not all functions of the AS 388/TM and AS 488/TM react iden-
tically to those in an AS 235 system. In individual cases, it
must be checked from the viewpoint of the other systems pri-
or to connection of an automation system to the system bus
whether the required communications functions can be im-
plemented with the AS 388/TM or AS 488/TM systems.
- Use of the STRUK-AS 220 EA program via the system bus is
not released for the AS 388/TM and AS 488/TM systems.
- Use of the AS bus configuring channel for operation/configur-
ing of another AS using a commissioning terminal is not re-
leased because of the serial communications mode of the
commissioning terminal.
- Communication to the process I/Os is carried out via serial
PROFIBUS-DP interfaces. These are operated according to
the standard protocol. If devices from other vendors are con-
nected, these must comply with the PROFIBUS-DP standard,
and their data interfaces must be completely described.
AS 388/TM and AS 488/TM automation systems each have
two PROFIBUS-DP interfaces.
- The AS 488/TM communicates with existing I/O modules from
the TELEPERM M range via a special interface module and
the parallel I/O bus interface (ribbon cable) in the
TELEPERM M cabinets.
- The process image is automatically generated by the inter-
face module, and this module must therefore recognize the
connected I/O modules. Only those modules and systems
listed in the Section "Migration of existing systems" or pub-
lished on the Internet "AS 488/TM configuration list" can be
used.
• Non-migratable systems
The AS 488/TM automation system does not offer a compatible
replacement for the fault-tolerant AS 235 H automation system;
migration would only be possible with relinquishing of the re-
dundancy. Furthermore, the FM 100 field multiplexer must con-
tinue to be operated on existing AS 230 / AS 235 automation
systems.
This catalog is out of date, see note on page 3