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Section 1 Introduction
Brooks
®
Digital MFC's & MFM's
Installation and Operation Manual
X-TMF-SLA5800-Series-RevB-MFC-eng
Part Number: 541B187AAG
January, 2017
Figure 1-5 SLA5800 Series Profibus Connections and Pinouts
Profibus Communications
The Brooks SLA5800 is now equipped to support the Profibus
communication protocol. Profibus is a fieldbus-based automation
standard of Profibus and Profinet International (PI). Via a single bus
cable, Profibus links controller or control systems with decentralized field
devices (sensors and actuators) on the field level and also enables
consistent data exchange with higher ranking communication systems. A
9-pin sub-D connector is included on every device and is galvanic
isolated from the main electronics as defined by the EN 50170 Profibus
standard to allow easy network connection separate from the main
connector. The main 15-pin sub-D connector or termination board is still
needed for the power supply, but also allows for the standard analog I/O
signals, analog valve override, and (open-collector) alarm signaling to be
used separate from the network connection.
The communication electronics allows for automatic baud rate detection
ranging from 9600 baud to 12 Mbaud, thus making the need for any
hardware baud rate selection methods not required. For selecting the
device address, which must be unique on the network, two rotary
switches are provided. This allows a user to easily select any address
number ranging from 0 to 126. This can provide fast device replacement
without complex network configurations. The Profibus-DP piggyback
board is equipped with a zero command pushbutton, allowing the user to
give a manual command to the device to (re)balance the flow sensor
electronics. This command can also be issued through the protocol.
The Profibus-DP communication option supports the following message types:
• Cyclic data exchange (Write/Read data).
• Read inputs (e.g. status, flow, temperature, totalizer, etc.).
• Read outputs (e.g. commands, setpoint).
• Global control commands (e.g. fail safe, sync).
• Get configuration (i.e. read number of I/O bytes and composition).
• Read diagnostics information (i.e. get error and alarm status).
• Set parameters (i.e. select gas number, engineering units, I/O configuration
• Set parameters (i.e. select gas number, engineering units, I/O
configuration etc.).
• Check configuration (i.e. check I/O composition).
Note: Aux Input is used for Remote
Transducer Pressure Controllers only.
