Data Sheet for Product

Notes on System Architecture
The Modbus 250 Driver provides communication between
the APOGEE
®
Automation System and Modbus devices.
In addition, the driver can support APOGEE P1 devices.
The Modbus 250 Driver supports the following:
• 3 FLNs (1 through 3) that can be used for
connecting and addressing either Modbus RTU or
P1 devices on RS-485 FLNs.
• 95 FLNs (6 through 100) for mapping devices via
an Ethernet ALN.
• upto247devicesperFLN.
• maximum of 8000 APOGEE points per driver.
• maximum of 250 Modbus points per driver.
The Modbus point limit of 250 per driver does
not apply to I/O, addressing, diagnostic, and
P1 application points.
Functionality
The Modbus 250 Driver can be loaded into MBC
Open Processor and MEC hardware. The driver is a
microprocessor-based, multitasking platform designed for
multi-system communication and control. The Modbus
250 Driver communicates with Insight
®
software, other
APOGEE field panels, controllers, and Modbus devices.
Through the Insight workstation, the Modbus points can
be monitored and commanded. The points integrated
into the APOGEE Automation System can be accessed
by system applications such as Powers Process Control
Language, scheduling, trending, and alarming. The
Modbus 250 Driver also supports standard I/O point
modules.
The Modbus 250 Driver will not normally affect the
operating sequence or safeties as factory programmed
into the other Modbus devices.
Keys to Success
Ensure that all Modbus equipment to be integrated
support the Modbus RTU or TCP protocols. The Modbus
ASCII protocol is not supported.
Benefits
Systems integration brings the powerful facility control
capabilities of the APOGEE Automation System together
with the Modbus devices. Integrating the Modbus points
allows both systems to operate as a single system
providing marked advantages in the following:
• Reduced operating and training costs.
• Increased employee productivity.
• Increased diagnostic capabilities to extend
equipment life.
• Improved systems information and control.
• Maximized energy savings.
Products Supported
Since Modbus is an extremely popular and well-supported
protocol, many devices and control systems have
Modbus available.
The Modbus 250 Driver also supports APOGEE P1 Field
Level Networks.
Siemens Building Technologies, Inc. Page 3 of 4
Document No. 127-1516