Difference between revisions of "Edge Gateway Modbus Adapter"
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Revision as of 07:47, 18 July 2017
Edge Gateway Home > Modbus Adapter
Contents
Modbus Protocol Connection
| protocol | Enum | Connection mode of Modbus device. Allowed values are TCP and Serial. As of now only TCP is supported. |
| ip_address | String | Machine IP address of the Modbus connection. |
| port | Number | Port number of Modbus connection. |
| datetime_config | Object | Optional. Configuration object to read date time tag values for this connection. |
| datetime_tag | Object | Optional. The tag from which thing date time needs to read. |
datetime_config object
| text_format | String | The format in which date time values needs to be converted to string e.g. EEE, dd MMM yyyy HH mm ss.SSS z.
Refer to https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html to get an idea of formatting values. |
| time_zone | String | The time zone in which date time values are stored |
| offset_ms | Number | The offset in milliseconds from which date time values should be considered. A 0 offset indicates 01 Jan 1970 00:00:00 GMT/UTC. |
datetime_tag object
| tag_type | Enum | Allowed values are InputRegister and HoldingRegister. |
| device_id | Number | Modbus device id from where data to be read. |
| read_count | Number | Number of bytes to be read from the date_addr or time_addr. |
| endian | Boolean | True value denotes big endian byte order which is default in Modbus, False value indicate little endian byte order. |
| date_addr | Number | Offset address of Modbus device id. This address stores number of days from offset_ms specified in datetime_config. |
| time_addr | Number | Offset address of Modbus device id. This address stores number of milli seconds offset from date_addr. |
Modbus Protocol Tag
| tag_id | String | Unique tag id defined in the context of the current thing_config. This is used further in metric_mappings or derived_tags or monitor_tag_ids to refer to this tag value. |
| tag_type | Enum | Allowed values are InputRegister, InputDiscrete, HoldingRegister and Coil. Types InputDiscrete and Coil can only hold boolean values. |
| val_type | Enum | Allowed values are boolean, integer, long, float, double, datetime_text and datetime_long. This indicates the type of tag value to be read from Modbus device address. In case of
tag_type InputDiscrete or Coil only boolean is considered. |
| device_id | Number | Modbus device id from where data to be read. |
| ref_addr | Number | Offset address of Modbus device id. This is applicable for val_type boolean, integer, long, float, double. |
| read_count | Number | Number of bytes to be read from the ref_addr or date_addr or time_addr. |
| endian | Boolean | True value denotes big endian byte order which is default in Modbus, False value indicate little endian byte order. Applicable in case of tag_type InputRegister or HoldingRegister. |
| bit_index | Number | Bit index used in case of boolean values read from tag_type InputDiscrete or Coil. |
| date_addr | Number | Offset address of Modbus device id from where date is read. This is applicable for val_type datetime_text, datetime_long. This address stores number of days from offset_ms of datetime_config value. |
| time_addr | Number | Offset address of Modbus device id from where time is read. This is applicable for val_type datetime_text, datetime_long. This address stores number of milli seconds offset from date_addr. |
