The Assurance Monitoring System is equipped with both TCP/IP and RTU (RS485) Modbus output options. Each Assurance device operates as a slave only.
When using the RTU protocol, the Assurance Monitoring System will answer to a master query only if the query contains the same slave address as defined on the Assurance device. The permitted addresses range from 1 to 254 (0x01 to 0xFE), and there should be no controllers with the same address on the same line.
|
Feature |
Description |
|---|---|
|
Supported Functions |
Read Input Register (0x03) |
|
Cyclical Redundancy Check (CRC) |
16-bit value calculated by both devices. Error message displayed when values are not equal. |
Table 4. Default Modbus Settings
|
Parameter |
Default Value |
|---|---|
|
IP Address |
192.168.1.222 |
|
TCP Port |
502 |
|
Modbus ID |
1 |
|
Baud Rate |
115200 |
|
Parity |
None |
|
Stop Bits |
1 |
The Modbus settings on the Assurance Monitoring System can be configured using a serial console, such as PuTTY. The Assurance System can be connected to a laptop with the serial console software using the DB9 serial port located on the backside of the Assurance faceplate.
Below is a list of commands that may be useful in configuring the Assurance System.
|
Example Command |
Result |
|---|---|
|
showsettings |
Shows the current Modbus settings |
|
mbid 1 |
Sets the Modbus ID to 1 |
|
baudrate 9600 |
Sets the baud rate to 9600 |
|
stopbits 1 |
Sets the number of stop bits to 1 |
|
mbtcpport 502 |
Sets the TCP Port to 502 |
|
ipaddr 192.168.1.100 |
Sets the IP address to 192.168.1.100 |
|
subnet 255.255.255.0 |
Sets the subnet mask to 255.255.255.0 |
|
gateway 192.168.1.1 |
Sets the default gateway to 192.168.1.1 |
The Assurance Monitoring System features a block of DIP switches (SW1) to set the desired termination resistance for Modbus RS485 communication. SW1 is located on the back side of the Assurance faceplate assembly adjacent to the Modbus RS485 termination points. The below table outlines the available termination resistor settings with corresponding DIP switch configurations.
|
Name |
Value Type |
Value Unit |
Register Type |
Address (Base 0) |
Supported Functions |
|---|---|---|---|---|---|
|
Shaft Voltage RMS |
Float |
Volts RMS |
Input Register |
30000 |
Read Input Register |
|
Shaft Voltage 0–Peak |
Float |
Volts 0–Peak |
Input Register |
30002 |
Read Input Register |
|
Shaft Voltage DC |
Float |
Volts DC |
Input Register |
30004 |
Read Input Register |
|
Ground Current RMS |
Float |
Amps RMS |
Input Register |
30006 |
Read Input Register |
|
Ground Current 0–Peak |
Float |
Amps 0–Peak |
Input Register |
30008 |
Read Input Register |
|
Ground Current DC |
Float |
Amps DC |
Input Register |
30010 |
Read Input Register |
|
Rope Status |
Integer |
Flag |
Input Register |
30012 |
Read Input Register |