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Identity
The identity field provides the user read only information
including the Firmware (Software) Version. Record
this
number
for
troubleshooting.
Modbus
r
The Modbusr Baud Rate is selectable and must be the
same for all connected devices. The Modbusr field
establishes the RSA III as a master or slave. Enter true
or false to the Is Modbus Master? line item. When used
as a slave, create a Modbusr Slave Address to
identify this RSA III on the Modbusr network.
The Modbusr Timeout Factor is a user-selectable
entry of 1 (fast)--10 (slow) with the default setting of 5.
Typically the default setting will provide adequate
system performance. The user may increase/decrease
the timeout factor as needed to optimize the RSA III with
the network system.
Line items Received Modbusr Message Count and
Modbusr Error Count indicate the performance of the
network. Showing Modbusr Error Count instances is
typical of some network communications and not a
reason for concern.
Product Connections
The generator set and ATS product IDs are no longer
user configurable.
The IDs are recognized by the
RSA III at the specified Modbus address.
Figure 53.
The product connection field requires three entries
(Product, Address, and Timeout).
The device description or Product identifies what type
of device is connected to the RSA III master such as a
generator set, transfer switch (ATS), or RSA III slave(s).
Each connection requires a unique Address. Change
the default setting as needed to create different
Modbusr is a registered trademark of Schneider Electric.
34
upgrading
firmware
addresses based on the range of 1--247. In addition,
each field creates addresses for each of the RSA III
slaves. Up to five slaves can be driven by one RSA III
master.
when
The Modbusr Timeout period is separately assignable
for each device. The timeout period is a user-selectable
entry of 1--120 seconds with the default setting of
15 seconds. Increase the timeout factor as needed
when working with a slow or unstable network to prevent
interruption or nuisance timeouts.
The Connected ATS parameter indicates if the RSA III
should expect an ATS on the network at the address
specified. When set to True, the RSA III notifies the user
when it cannot communicate with the ATS. If the RSA III
auto-detection logic finds an ATS on the network, the
RSA III sets the ATS connected parameter to True and
saves the setting. Should the ATS be removed from the
network for some reason, set this parameter back to
False.
Product Connection Inputs
The product connection input field provides the user
with choices to show selected status, warning, or
shutdown faults. EPS supplying load and three digital
inputs are available for monitoring.
For EPS Supplying Load Indicator connections, refer
to Figure 56 to select the EPS source.
The Source can be from the generator set, ATS, or
(local) hardwired directly to the RSA III.
See
Figure 56.
Select the Event Level as either a warning (yellow light)
or fault shutdown (red light).
This field also provides an Events Log which is a history
of faults that the RSA III encounters while energized.
The generator set may or may not be running at the time
of the event. Review the Events Log for a summary of
the performance of the network communication.
Refer to
TT-1625 7/17
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