Siemens RUGGEDCOM RSG2200 User's Guide Page 34

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Chapter 1
Introduction
RUGGEDCOM ROS
User Guide
22 TruthValues
0x04 0x00 0x43 0x00 0x01
The response may look like:
0x04 0x02 0x00 0x0A
The lower byte of the register displays the power supply's status. In this example, both power supplies in the unit
are functional.
Section 1.6.3.8
TruthValues
The Truthvalues format represents a true or false status in the device:
1 indicates the corresponding status for the device to be true
2 indicates the corresponding status for the device to be false
Reading the FailSafe Relay Status From a Device Using TruthValue
To understand how to use the TruthValue format to read the FailSafe Relay status from a device, consider a
ModBus request to read multiple registers from location 0x0044.
0x04 0x00 0x44 0x00 0x01
The response may look like:
0x04 0x02 0x00 0x01
The register's lower byte shows the FailSafe Relay status. In this example, the FailSafe Relay is energized.
Reading the ErrorAlarm Status From a Device Using TruthValue
To understand how to use the TruthValue format to read the ErrorAlarm status from a device, conside a ModBus
request to read mulitple registers from location 0x0045.
0x04 0x00 0x45 0x00 0x01
The response may look like:
0x04 0x02 0x00 0x01
The register's lower byte shows the ErrorAlarm status. In this example, there is no active ERROR, ALERT or
CRITICAL alarm in the device.
Section 1.7
Certificate and Key Requirements
Users are able to load custom and unique SSL certificates and SSL/SSH keys in ROS or use the certificates and
keys provided by ROS.
There are three types of certificates and keys:
NOTE
Default and auto-generated SSH keys are not available for Non-Controlled (NC) versions of ROS.
Default
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