Toshiba T2N - Manual (Page 142)

5.RAS Functions
User’s manual 129
The following functions are provided for diagnosis of operation/status. The system
can be monitored easily using of these functions.
(1) Diagnostics display function
Use of the diagnostics display instruction (DIAG) in the user program, the
relevant error code (1-64) and error message (maximum 12 characters per
message) can be displayed on the programmer screen. Also, the error
code generated is stored in the special register (SW016-SW033) in order
of generation up to a maximum of 16 codes and the annunciator relay
(S0340-S037F) corresponding to the error code goes ON. It is possible to
use the special register/relay to display the error code on an external
display monitor.
The error code registered can be reset one at a time (shift up after erased)
using the programmer or by the diagnostics display reset instruction (DIAR).
This function may also be used effectively in conjunction with the bit
pattern check and the sequence time over detection mentioned below.
(Refer to details of diagnosis display command in other manual on
instruction set.)
When error codes are registered, for example 3, 10, 29, 58, each
corresponding annunciator relay, S0342, S0349, S035C, S0379 comes ON.
5.7
System diagnostics
first error code
number of codes
first error code
error code 2
error code 3
error code 4
SW016
SW017
SW018
SW019
SW020
SW021
SW033
diagnostics display instruction run
(error codes registered to the end)
diagnostics display reset instruction
run or reset by programmer
display on programmer
(first error code and
corresponding error
message)
∼
16 15 14 13 12 11 9 8 7 6 5 4 2 1
32 31 30 28 27 26 25 24 23 22 21 20 19 18 17
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
64 63 62 61 60 59 57 56 55 54 53 52 51 50 49
29
SW034
SW035
SW036
SW037
F E D C B A 9 8 7 6 5 4 3 2 0 1
(Annunciator relay)
3 10
58