User guide

Chapter 1
Introduction
RUGGEDCOM ROS
User Guide
20 Uint16
• FF 00 hex requests output to be True
• 00 00 hex requests output to be False
• Any value other than the suggested values does not affect the requested operation
For example, consider a Write Multiple Registers request to clear alarms in the device.
0x10 0x00 0x80 0x00 0x01 2 0xFF 0x00
• FF 00 for register 00 80 clears the system alarms
• 00 00 does not clear any alarms
The response may look like:
0x10 0x00 0x80 0x00 0x01
Section 1.6.3.3
Uint16
The Uint16 format describes a Standard ModBus 16 bit register.
Section 1.6.3.4
Uint32
The Uint32 format describes Standard 2 ModBus 16 bit registers. The first register holds the most significant 16
bits of a 32 bit value. The second register holds the least significant 16 bits of a 32 bit value.
Section 1.6.3.5
PortCmd
The PortCmd format describes a bit layout per port, where 1 indicates the requested action is true, and 0
indicates the requested action is false.
PortCmd provides a bit layout of a maximum of 32 ports. Therefore, it uses two ModBus regsiters:
• The first ModBus register corresponds to ports 1 – 16
• The second ModBus register corresponds to ports 17 – 32 for a particular action
Bits that do not apply to a particular product are always set to zero (0).
A bit value of 1 indicates that the requested action is true. For example, the port is up.
A bit value of 0 indicates that the requested action is false. For example, the port is down.
Reading Data Using PortCmd
To understand how to read data using PortCmd, consider a ModBus Request to read multiple registers from
locatoin 0x03FE.
0x04 0x03 0xFE 0x00 0x02
The response depends on how many parts are available on the device. For example, if the maximum number of
ports on a connected RUGGEDCOM device is 20, the response would be similar to the following:
0x04 0x04 0xF2 0x76 0x00 0x05