View source for IF-12

=== Modbus Registers ===
Below is a list of available MODBUS registers. The same register numbers are also used by the MIOS-2 protocol.

=== Modbus Read / Write (0x17) Function ===
METEL IO modules have implemented the MODBUS function (0x17) Read/Write of Multiple registers. Typically it is required to have two separate requests (and responses) for:

1. Writing of outputs via MODBUS function (0x16) Writing Multiple Registers

2. Reading of inputs via MODBUS function (0x03) Read Holding Registers


This requires a total of 4 frames to be sent over MODBUS. If using 0x17 function only one request is needed for the reading and writing of outputs. This requires a total of 2 frames to be sent over MODBUS.


=== Default Settings of Communication ===
Device ID: 1 <br />
Baudrate: 115 200 <br />
Parity: None <br />
Data bits: 8 <br />
Stop bits: 1 <br />

{{Note|NoteText=
The MODBUS address is the same as the address of the main device of which the IF module is part.
}}

<!-- MODBUS "IF-12 States of Inputs" registers table -->
{| class="wikitable"
|-
|- style="font-size: 17px;"
! colspan="2" | Subject !! style="width: 110px;" | Channel !! style="width: 30px;" | Type !! style="width: 30px;" | R/W !! style="width: 230px;" | Value !! style="width: 60px;" | Offset
|-
| rowspan="9" style="width: 90px;" | <span style="font-size: 17px;"> '''IF-12 <br /> States of <br /> Inputs''' </span> 
|| Balanced Input 1 (bin) || DI#33 || bit || R || rowspan="4" | 0 = inactive <br /> 1 = active || 3033
|-
| style="width: 120px;" | Balanced Input 2 (bin) || DI#34 || bit || R || 3034
|-
| Balanced Input 3 (bin)|| DI#35 || u16 || R || 3035
|-
| Balanced Input 4 (bin)|| DI#36 || u16 || R || 3036
|-
| Balanced Input 1 || AI#33 || u16 || R || rowspan="4" | 1000 = 1000Ω <br /> 0 = 0Ω || 5033
|-
| Balanced Input 2 || AI#34 || u16 || R || 5034
|-
| Balanced Input 3 || AI#35 || u16 || R || 5035
|-
| Balanced Input 4 || AI#36 || u16 || R || 5036
|-
| Inputs || DI#33 - DI#48 || u16 || R || 0x0000 - 0x000F || 
|}