Toshiba AS311 - Manual (Page 63)

User’s Manual
61
Appendix
Note 1) The special module can be designated not only by the assigned register, but
also by the mounting position. The mounting position is designated by a
constant data for the operand A as follows.
(Unit number)
×
256
+
(Slot number)
H
Slot number (hexadecimal)
Unit number (hexadecimal)
For example, if a special module is mounted on Slot-4, Unit-0 (basic unit)
and allocated to XW008 - YW011, the following two READ instructions
function the same.
[ XW008 READ RW010
→
D0100 ]
[ H0004 READ RW010
→
D0100 ]
Note 2) The READ instruction is not executed as error in the following cases. In
these cases, ERF (instruction error flag = S0051) is set to ON.
•
When the operand A is other than a valid constant (see Note 1) or XW/YW
register.
•
When the designated special module has been disconnected.
•
When no answer error occurs with the designated special module.
•
When the number of words transferred exceeds 256 words.
•
When the source table of transfer is out of the valid range.
•
When the destination table of transfer is out of the valid range.
Unit number Hexadecimal
0 H00
1 H01
2 H02
3 H03
Slot number Hexadecimal
0 H00
1 H01
2 H02
3 H03
4 H04
5 H05
6 H06
7 H07
8 H08
9 H09
10 H0A