Jetter NANO-C - Special Flags for the System Bus; Access to JX-SIO Analog Values

NANO-C, V3.00 to V3.01 Version Update – March 2003
Jetter AG 11
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.