IDEC MICROSmart FC5A Series, User Manual

Page: 290 / 343

24: AS ‐ I
NTERFACE
M
ASTER
C
OMMUNICATION
24 ‐ 18 FC5A M
ICRO
S
MART
U
SER
’
S
M
ANUAL
FC9Y ‐ B1273
AS ‐ Interface Devices
This section describes AS ‐ Interface devices assigned in the CPU module to control and monitor the AS ‐ Interface master
module, and describes ASI commands used to update AS ‐ Interface devices in the CPU module or to control the AS ‐ Inter ‐
face master module.
The FC5A MicroSmart CPU modules can be used with one or two AS ‐ Interface master modules. For the first AS ‐ Interface
master module, which is mounted closer to the CPU module, the AS ‐ Interface objects can be accessed through the AS ‐
Interface devices, such as internal relays M1300 through M1997 and data registers D1700 through D1999 as shown on
page 24 ‐ 19.
Details about AS ‐ Interface objects for AS ‐ Interface master module 2 are described on the following pages.
Processing Time
For AS ‐ Interface master module 1, AS ‐ Interface internal relays for digital I/O and status information, and data registers
for LAS, LDS, LPF are updated in every scan. Data registers for analog I/O devices are also updated in every scan only
when analog I/O are connected to the AS ‐ Interface bus. The processing times for these AS ‐ Interface devices are shown in
the table on page 24 ‐ 19.
Other AS ‐ Interface data registers are updated when an ASI command is executed in the CPU module. For the processing
times of the ASI commands, see page 24 ‐ 30.
For AS ‐ Interface master module 2, AS ‐ Interface objects are updated using the RUNA instruction.
AS ‐ Interface Master Module 1 AS ‐ Interface Master Module 2 AS ‐ Interface Power Supply

2
To two separate AS ‐ Interface networks
Note: When using two AS ‐ Interface master modules, two AS ‐
Interface power supplies are needed. Since the AS ‐ Interface
cable transmits both signals and power, each network
requires a separate power supply.
Ladder
Processing
Other
Processing
AS ‐ Interface
Processing
Constantly
Updated Devices
M1300 ‐ M1997
ASI Command
D1941 ‐ D1945
ASI Command
AS ‐ Interface
AS ‐ Interface Objects
IDI, ODI
Status Information
Analog I/O
LAS, LDS, LPF
LPS, CDI, PCD
PI, PP
Slave 0 ID1 D1776 ‐ D1940
Updated Devices
D1700 ‐ D1775
AS ‐ Interface Devices
Master Module 1
MicroSmart CPU Module
AS ‐ Interface
Master Module 2
AS ‐ Interface Objects
IDI, ODI
Status Information
Analog I/O
LAS, LDS, LPF
RUNA Instruction