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Configuring Modbus TCP Master (view source)
Revision as of 08:31, 12 September 2019
, 08:31, 12 September 2019→Alarms
[[File:AddedSlaveDevice.png]]
[[File:AddedSlaveDevice.png]]
Select appropriate function and click ''''Add''''.
[[File:AddAlarm.png]]
Say in this simple example we want to trigger output (specifically relay output) when our system uptime value will be higher than 0 (this is always true since the second register where the information is hold stores router's system uptime in seconds). After saving configuration every minute (because period for sending requests to the slave device is set to 60 seconds) the relay output would invert and if you are close to the device you should hear it. The following alarm configuration will be looking like this:
[[File:RelayOutputAlarm.png]]
The table below provides information on fields that this page contains:
The table below provides information on fields that this page contains:
<table class="nd-mantable">
<tr>
<th>Field</th>
<th>Value</th>
<th>Description</th>
</tr>
<tr>
<td>Enabled</td>
<td>yes | no; default: <b>no</b></td>
<td>Turns the alarm on or off</td>
</tr>
<tr>
<td>Function code</td>
<td>Read Coil Status (1) | Read Input Status (2) | Read Holding Registers (3) | Read Input Registers (4); default: <b>Read Coil Status (1)</b></td>
<td>Modbus function used in Modbus request.</td>
</tr>
<tr>
<td>Register</td>
<td>integer [0..65535]; default: <b>none</b></td>
<td>Number of the Modbus coil/input/holding register/input register that will be read.</td>
</tr>
<tr>
<td>Condition</td>
<td>More than | Less than | Equal to | Not Equal to; default: <b>Equal to</b></td>
<td>When a value is obtained it will be compared against the value specified in the following field. The comparison will be made in accordance with the condition specified in this field.</td>
</tr>
<tr>
<td>Value</td>
<td>various; default: <b>none</b></td>
<td>The value against which the read data will be compared.</td>
</tr>
<tr>
<td>Action</td>
<td>SMS | Trigger output | Modbus Request; default: <b>SMS</b></td>
<td>Action that will be taken if the condition is met. Possible actions:
<ul>
<li><b>SMS</b> - sends and SMS message to a specified recipient(s).</li>
<li><b>Trigger output</b> - changes the state of a specified output(s).</li>
<li><b>Modbus Request</b> - sends a Modbus request to a specified slave.</li>
</ul>
</td>
</tr>
<tr>
<td><span style="color: #0054a6;">SMS: Message</span></td>
<td>string; default: <b>none</b></td>
<td>SMS message text.</td>
</tr>
<tr>
<td><span style="color: #0054a6;">SMS: Phone number</span></td>
<td>phone number; default: <b>none</b></td>
<td>Recipient's phone number.</td>
</tr>
<tr>
<td><span style="color: red;">Trigger output: Output</span></td>
<td>Open collector output | Relay output | Both; default: <b>Open collector output</b></td>
<td>Which output(s) will be triggered.</td>
</tr>
<tr>
<td><span style="color: red;">Trigger output: I/O Action</span></td>
<td>Turn On | Turn Off | Invert; default: <b>Turn On</b></td>
<td>Action that will taken on the specified output.</td>
</tr>
<tr>
<td><span style="color: purple;">Modbus Request: IP address</span></td>
<td>ip | host; default: <b>none</b></td>
<td>Modbus slave's IP address.</td>
</tr>
<tr>
<td><span style="color: purple;">Modbus Request: Port</span></td>
<td>integer [0..65535]; default: <b>none</b></td>
<td>Modbus slave's port.</td>
</tr>
<tr>
<td><span style="color: purple;">Modbus Request: Timeout</span></td>
<td>integer [1..30]; default: <b>5</b></td>
<td>Maximum time to wait for a response.</td>
</tr>
<tr>
<td><span style="color: purple;">Modbus Request: ID</span></td>
<td>integer [1..255]; default: <b>none</b></td>
<td>Modbus slave ID.</td>
</tr>
<tr>
<td><span style="color: purple;">Modbus Request: Modbus function</span></td>
<td>Read Coil Status (1) | Read Input Status (2) | Read Holding Registers (3) | Read Input Registers (4) | Force Single Coil (5) | Preset Single Register (6) | Force Multiple Coils (15) | Force Multiple Registers (16); default: <b>Force Single Coil (5)</b></td>
<td>A function code specifies the type of register being addressed by a Modbus request.</td>
</tr>
<tr>
<td><span style="color: purple;">Modbus Request: First register</span></td>
<td>integer [0..65535]; default: <b>none</b></td>
<td>Begins reading from the register specified in this field.</td>
</tr>
<tr>
<td><span style="color: purple;">Modbus Request: Number of registers</span></td>
<td>integer [0..65535]; default: <b>none</b></td>
<td>The number of registers that will be read from the first register.</td>
</tr>
</table>
==Clone Slave Configuration==
==Clone Slave Configuration==