As-Interface Operands - IDEC FC4A-C10R2 User Manual

28: AS-I M
NTERFACE

AS-Interface Operands

This chapter describes AS-Interface operands, or internal relays M1300 through M1997 and data registers D1700 through
D1999, assigned in the CPU module to control and monitor the AS-Interface bus, and provides detailed description about
internal relays allocated to SwitchNet™ control units for use as slaves in the AS-Interface network. Also describes ASI
commands used to update AS-Interface operands in the CPU module or to control the AS-Interface master module.
AS-Interface Operand Allocation Numbers
The I/O data and parameters of slaves on the AS-Interface bus, the status of the AS-Interface bus, and various list informa-
tion of the slaves are allocated to the AS-Interface master module EEPROM. This information is called AS-Interface
objects, which can be accessed through the AS-Interface operands. The allocation is shown in the table below.
MicroSmart CPU Module
Operand Allocation No.
M1300-M1617
AS-Interface
Internal M1620-M1937
Relays
M1940-M1997
D1700-D1731
D1732-D1763
D1764-D1767
D1768-D1771
D1772-D1775
D1776-D1779
AS-Interface
Data D1780-D1843
Registers
D1844-D1907
D1908-D1923
D1924-D1939
D1940
D1941-D1945
D1946-D1999
*1: The time required to update the operand data. When using the AS-Interface master module, the scan time increases by
a minimum of 10 ms.
*2: These AS-Interface operand data can be read or written using WindLDR. For details, see page 28-30.
*3: The LPS, PCD, and PP are set and downloaded to a PLC using WindLDR. For details, see page 28-32.
*4: IDI (input data image), ODI (output data image)
*5: The analog I/O data is updated only when an analog slave is connected to the AS-Interface bus.
Processing Time
AS-Interface internal relays for digital I/O and status infor-
mation, and data registers for LAS, LDS, LPF are updated
in every scan. Data registers for analog I/O operands are
also updated in every scan only when analog I/O are con-
nected to the AS-Interface bus. The processing times for
these AS-Interface operands are shown in the table above.
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 28-28.
28-18
C
ASTER OMMUNICATION
Precessing
Time (msec)
3.0
3.0
1.0
5.2
5.2
1.0
1.0
1.0
1.0
10.4
10.4
3.0
3.0
0.7
—
—
« FC4A M
AS-Interface Master Module EEPROM
Read/
*1
Write
*2
R Digital input (IDI)
*2
W Digital output (ODI)
R Status information
R Analog input
W Analog output
*2
R List of active slaves (LAS)
*2
R List of detected slaves (LDS)
*2
R List of peripheral fault slaves (LPF)
*2*3
R/W List of projected slaves (LPS)
*2
R Configuration data image (CDI)
*2*3
R/W Permanent configuration data (PCD)
*2
R Parameter image (PI)
*2*3
R/W Permanent parameter (PP)
R/W Slave 0 ID1 code
R/W For ASI command description
—
Ladder
Processing
AS-Interface
Processing
Other
Processing
S U ' M
ICRO MART SER S ANUAL
AS-Interface Object
*4
*4
*5
*5
(reserved)
MicroSmart CPU Module
AS-Interface Operands
Constantly
Updated Operands
M1300-M1997
D1700-D1775
ASI Command
D1941-D1945
ASI Command
Updated Operands
D1776-D1940
»
Operand
Updated
Every scan
Each time ASI
command is
executed
—
—
AS-Interface
Master Module
AS-Interface Objects
IDI, ODI
Status Information
Analog I/O
LAS, LDS, LPF
LPS, CDI, PCD
PI, PP
Slave 0 ID1