NANO-C, V3.00 to V3.01
Version Update – March 2003
Jetter AG
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2.3.3 Special flags for the system bus
With the help of a special flag, the NANO-C indicates certain errors. This makes a
detailed error analysis possible. After start-up, the NANO-C will clear all special flags.
Survey of the special flags for the system bus
Special Flag
Description
2048
Timeout at access to a JX2-I/O module
2049
Timeout at access to a JX2 slave-module
2050
Timeout at access to a JX2-I/O module
2065
Error signalising at output driver errors has been activated.
2067
Fatal system bus error
2068
Errors have accumulated at the system bus interface
2270
Timeout at access to a JX-SIO which is not active
2272
Access to an unknown JX-SIO-register
2273
Access to a register which is not supported by this JX-SIO,
e.g. configuration of an analog input, although there is no
analog input terminal
2274
Timeout at JX-SIO monitoring
2275
JX-SIO has carried out an internal reset, which means it is
not ready for operation
2276
Overflow at a read access to a 32-bit register
2.3.4 Access to JX-SIO analog values
Up to now, registers 5x60 through 5x71, as well as registers 6x60 through 6x71 have
been written, respectively read, while a REGISTER instruction was being processed.
In order to achieve an increase in performance, the NANO-C reads all analog inputs in the
background, when all tasks have been processed. If special flag
2059
has been set, the
analog inputs are even read after each task switch.
All changed analog outputs are written to the JX-SIO at the end of a task.
