Filter
Top Products
C141-E124-01EN 3 - 121
(4) Mode = 0, 1, 0, 0: Microcode download, without saving
In this mode, the controller’s microcode or control information is transferred to the IDD’s control
memory area. “0” must be specified in the “Buffer ID” field and the “Buffer address” field.
The "Transfer byte length" field specifies the total number of transfer bytes of data transferred
from the INIT.
When downloading of microcode is completed, the IDD generates a UNIT ATTENTION
condition for all the INITs. At this time, the IDD performs microprogram reboot and generates
sense code.
The IDD operates according to this microcode until its power is switched off. If the power is
switched on again, the IDD’s operation returns to the existing microcode saved previously on the
disk.
Note:
Depending on the setting in the IDD, if done using the START/STOP command, it is necessary to
issue the START command after issuing his command. See the description of the motor starting
modes in Section 5.3.2 of the “Product Manual” concerning the setting terminal.
(5) Mode = 0, 1, 0, 1 : Microcode download, with saving
In this mode, the controller’s microcode or control information is transferred to the IDD’s control
memory area and written to the disk. “0” must be specified in the “Buffer ID” field and the
“Buffer address” field.
The "Transfer byte length" field specifies the total number of transfer bytes of data transferred
from the INIT.
When all the data have been received, the IDD writes the new microcode to the disk’s system area
and operates in accordance with this microcode until new microcode is downloaded.
Note:
When abnormal termination for reasons other than ILLEGAL REQUEST [=5] / Invalid field in
CDB [=24-00] or ILLEGAL REQUEST [=5] / Invalid field in parameter list [=26-00] occurs,
the IDD indicates that downloading of the new microcode failed, and it is therefore necessary
for the INIT to quickly download the new microcode.
When downloading of microcode is completed, the IDD generates a UNIT ATTENTION
condition for all the INITs except the INIT that issued the WRITE BUFFER command. At
this time, the sense code indicates “Microcode has been changed [=3F-01].”