Toshiba AS311 user manual Appendix

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 C as follows.

(Unit number) ⋅ 256 + (Slot number)

H

Slot number (hexadecimal)

Unit number (hexadecimal)

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

For example, if a special module is mounted on Slot-2, Unit-1 (expansion unit #1) and allocated to XW020 - YW023, the following two WRITE instructions function the same.

[ D0100	WRITE	RW010	→	XW020 ]
[ D0100	WRITE	RW010	→	H0102 ]

Note 2) The WRITE 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 C 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.

User’s Manual 63