Pdo Write - Emerson RSTi-OM User Manual

RSTi-OM User Manual
GFK-3212A
"op": "read", "index": 24,
"str": "hi there"
"len": 16,
"status": "OK"
}
IOLM/port/1/isdu/request/1c510d4d-151e-49b3-bbad- 0847a272812e
{
"op": "read", "index": 24,
"format": "raw"
}
IOLM/port/1/isdu/response/1c510d4d-151e-49b3-bbad- 0847a272812e
{
"op": "read",
"index": 24, "raw":[104,105,32,116,104,101,114,101,0,0,0,0,0,0,0,0],
"len": 16,
"status": "OK"
}
IOLM/port/3/isdu/request/1234
{
"op": "read", "index": 15,
"format": "str"
}
IOLM/port/3/isdu/response/1234
Example: negative response 'Index not available'
{
"op": "read", "index": 15, "status": "Error",
"errormsg": "index invalid", "errortype": {
"status": 1,
"code": 128,
"addcode": 17
}
}
12.6

PDO Write

PDO values may be written by publishing to MqttTopicBase/port/n/pdo/wr. The payload may contain PDO
data fields in one of two formats: raw or uint. Data in raw format must match the PDO length exactly. Data in
uint format is supported only for PDO lengths of 4 bytes or less. If an IODD file is present that defines Process
Data groups and fields, then those may be used to write to individual field values. The available groups/fields
MQTT Interface
Section 12
Jun 2021
124