3-5
Section 3 Operation
Models SLA5810/20 and SLAMf10/20
Installation and Operation Manual
X-PR-SLA5800-SLAMf-Series-RevB-PC-eng
Part Number: 541B198AAG
January, 2017
RS485 equipped units support the following baud rates. Please specify the
desired baud rate when ordering (default is 19200 baud). Alternately, baud
rate may be changed using the Brooks Expert Support Tool (BEST).
Baud Rates: 1200, 2400, 4800, 9600,
19200
and 38400
Reference the Brooks document "Supplemental Manual for RS485
Communications for Brooks
®
MFCs/MFMs, for SLA5800/SLAMf Revsion B
Series" (X-DPT-RS485-SLA5800-SLAMf-Series-RevB-MFC-PC-RT-eng) for
more details regarding the capabilities of this communication interface.
3-5-2 Profibus Communications Features
The Brooks SLA5810/20 and SLAMF10/20 is now equipped to support the
Profibus communication protocol.
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 device 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).
3-5-3 DeviceNet Communications Features
The Brooks Digital Pressure Controllers are also available with DeviceNet
TM
communication capability. DeviceNet is an open digital protocol capable of
high speeds and easy system connectivity. Brooks Instrument has several of
its devices available on this popular networking standard, and is a member of
ODVA
TM
(Open DeviceNet Vendors Association), the governing standard body
for DeviceNet.
DeviceNet
is similar to the RS485 standard in that it is a multi-drop connection
that allows a maximum of 64 devices to be connected on the same network.
Baud rate selections for DeviceNet
products are 125K, 250K and 500K and
can be selected via MAC ID switches mounted on the device.
