IDEC MicroSmart AS-i - Manual (Page 35)

6: AS-I NTERFACE O PERANDS
6-4 M ICRO S MART AS-I NTERFACE M ASTER M ODULE U SER ’ S M ANUAL
Analog I/O Data of Analog Slaves
The I/O data for a maximum of seven analog slaves (four channels for each slave) on the AS-Interface bus is stored to AS-
Interface data registers in the CPU module. The analog slave addresses (1 to 31) are in the ascending order. The input data
for each analog slave is allocated to data registers D1700 to D1731, and the output data is allocated to D1732 to D1763.
The AS-Interface master module is compliant with analog slave profile 7.3.
• Analog Input Data
Analog Input Channel No. Data Format
D1700 Bytes 0 and 1 Channel 1
1st data
(AI0)
D1701 Bytes 2 and 3 Channel 2
D1702 Bytes 4 and 5 Channel 3
D1703 Bytes 6 and 7 Channel 4
D1704 Bytes 8 and 9 Channel 1
2nd data
(AI1)
D1705 Bytes 10 and 11 Channel 2
D1706 Bytes 12 and 13 Channel 3
D1707 Bytes 14 and 15 Channel 4
D1708 Bytes 16 and 17 Channel 1
3rd data
(AI2)
D1709 Bytes 18 and 19 Channel 2
D1710 Bytes 20 and 21 Channel 3
D1711 Bytes 22 and 23 Channel 4
D1712 Bytes 24 and 25 Channel 1
4th data
(AI3)
D1713 Bytes 26 and 27 Channel 2
D1714 Bytes 28 and 29 Channel 3
D1715 Bytes 30 and 31 Channel 4
D1716 Bytes 32 and 33 Channel 1
5th data
(AI4)
D1717 Bytes 34 and 35 Channel 2
D1718 Bytes 36 and 37 Channel 3
D1719 Bytes 38 and 39 Channel 4
D1720 Bytes 40 and 41 Channel 1
6th data
(AI5)
D1721 Bytes 42 and 43 Channel 2
D1722 Bytes 44 and 45 Channel 3
D1723 Bytes 46 and 47 Channel 4
D1724 Bytes 48 and 49 Channel 1
7th data
(AI6)
D1725 Bytes 50 and 51 Channel 2
D1726 Bytes 52 and 53 Channel 3
D1727 Bytes 54 and 55 Channel 4
D1728 Bytes 56 and 57 —
(reser ved)
D1729 Bytes 58 and 59 —
D1730 Bytes 60 and 61 —
D1731 Bytes 62 and 63 —
Caution
• The maximum number of analog slaves that can be connected to the AS-Interface bus is seven. Do
not connect eight or more analog slaves to one bus, otherwise the slaves will not function correctly.
• When data registers D1700 through D1731 allocated to analog inputs contain 7FFF, do not use this
data for programming, because this value is reserved for a special meaning as follows:
Unused channel on a slave allocated to analog slave. (For a channel on a slave not allocated an
analog slave, the corresponding data register holds an indefinite value.)
Data over flow.
Communication between the master and analog slave is out of synchronism.
• When using analog slaves, read the user’s manual for the analog slave to process the data properly.