Error
code
HTTP
code
Message Note
206 400 JSON data value out of bounds An array/string was accessed whose max‐
imum length was exceeded.
207 400 deviceAlias is not unique
208 400 POST request without content
Error during resource access
301 404 Resource not found E.g. incorrect URL
302 404 masterNumber not found
303 404 portNumber not found
304 404 deviceAlias not found
305 400 Query parameter name invalid
306 400 Query parameter value invalid
307 400 Port is not configured to IO-Link E.G.: IOLINK_MANUAL or IOLINK_AUTOS‐
TART mode
308 404 IO-Link device is not accessible E.g. not connected or communication
error
309 404 IO-Link parameter not found
310 404 IO-Link parameter access not
supported by the device
311 400 IO-Link parameter access error The additional “iolinkErrorCode” and
“iolinkErrorMessage” fields contain the
IO-Link error code and the event text from
the ErrorTypes table.
312 404 IO-Link parameter name is not
unique
Please use the format [Name]_[Index].
DataStorage error
401 400 Data storage mismatch No match between configured device and
data from data memory. Check device ID.
Processing error in the process data
501 400 I/Q is not configured as DIGI‐
TAL_OUTPUT
Writing process data on I/Q is not possi‐
ble
502 400 C/Q is not configured as DIGI‐
TAL_OUTPUT
Writing process data on C/Q is not possi‐
ble
503 400 IO-Link device has no output
process data
Error in the payload
701 400 Data set incomplete
702 400 Data set not applicable The entire data set is denied
703 400 Data set combination incompati‐
ble
The entire data set is denied
8.2.2 MQTT client
The SIG350 provides a MQTT interface with JSON data format for accessing the data of
the IO-Link Master and of the connected devices. These operating instructions provide
an overview of the available messages and the access mechanisms.
8 OPERATION
44
O P E R A T I N G I N S T R U C T I O N S | Sensor Integration Gateway - SIG350 8027836./2022-06-10 | SICK
Subject to change without notice
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