IDEC FC4A-C10R2, User Manual

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28: AS-I
NTERFACE
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OMMUNICATION
28-28 « FC4A M
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ANUAL
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ASI Commands
The ASI commands are used to update AS-Interface operands in the CPU module or to control the AS-Interface master
module. Data registers D1941 through D1944 are used to store command data. D1945 is used to store a request code
before executing the command. While the command is executed, D1945 stores status and result codes.
ASI Command Format
ASI Command Data
To execute an ASI command, store required values to data resisters D1941 through D1945 as listed in the table below:
*1: WindLDR has the Slave Status dialog box to execute this command to write a PI value to a designated slave. See Sam-
ple Program on page 28-29.
*2: WindLDR has the Change Slave Address dialog box to execute this command.
*3: Completed in a scan when the five data registers store respective values. When completed, D1945 stores 4. See
Request and Result Codes on page 28-29. Other commands takes several scans to complete execution.
*4: Each scan time extends by 0.8 ms. At least 1 sec is required until the ASI command takes effect.
Note: Specify the slave address in the data register as shown in the table below:
Command Part (8 bytes) Request/Result
D1941 D1942 D1943 D1944 D1945
ASI Command
Processing
Time (ms)
Description
Command Data (Hexadecimal)
D1941 D1942 D1943 D1944 D1945
Read LPS
1.0
*3
Reads LPS to D1776-D1779 010B 084C 0000 0000 0001
Read CDI
10.4
*3
Reads CDI to D1780-D1843 010C 4050 0000 0000 0001
Read PCD
10.4
*3
Reads PCD to D1844-D1907 010E 4090 0000 0000 0001
Read PI
3.0
*3
Reads PI to D1908-D1923 0107 20D0 0000 0000 0001
Read PP
3.0
*3
Reads PP to D1924-D1939 0108 20E0 0000 0000 0001
Read Slave 0 ID1
0.7
*3
Reads slave 0 ID1 to D1940 0109 02F0 0000 0000 0001
Write Slave 0 ID1
0.7
*3
Writes D1940 to slave 0 ID1 0209 02F0 0000 0000 0001
Copy PI to PP 0.8
*4
Copies parameter image to perma-
nent parameter
0306 0100 0000 0000 0001
Change Slave PI
*1
0.8
*4
Writes PI (
∗
) to slave (
∗∗
) (Note) 0306 0102 000
∗
00
∗∗
0001
Go to Normal Protected Offline
0.8
*4
From normal protected mode to nor-
mal protected offline
0306 0301 0000 0000 0001
Go to Normal Protected Mode
0.8
*4
From normal protected offline to nor-
mal protected mode
0306 0300 0000 0000 0001
Prohibit Data Exchange
0.8
*4
From normal protected mode to nor-
mal protected data exchange off
0306 0401 0000 0000 0001
Enable Data Exchange
0.8
*4
From normal protected data exchange
off to normal protected mode
0306 0400 0000 0000 0001
Change Slave Address
*2
0.8
*4
Change slave address (
∗∗
) to new
address (++) (Note)
0306 0500 00
∗∗
00++ 0001
Enable Auto Addressing
0.8
*4
Enables auto address assign (default) 0306 0800 0000 0000 0001
Disable Auto Addressing
0.8
*4
Disables auto address assign 0306 0801 0000 0000 0001
Slave Address
Data Register Value
Slave Address
Data Register Value
Hexadecimal Decimal Hexadecimal Decimal
0(A) 00h 0 — — —
1(A) 01h 1 1B 21h 33
2(A) 02h 2 2B 22h 34
| | | | | |
31(A) 1Fh 31 31B 3Fh 63