User`s manual

354
15.4 Switching the Mode from the Programmable Controller
CPU
This section shows how the Q series C24 mode is switched from the programmable controller CPU.
15.4.1 Mode switching procedure
The following explains the procedure for switching the Q series C24 mode from the programmable controller CPU.
*1 Inform in advance all the connected device that data communications by mode switching cannot be performed.
*2 When XE and XF were turned on, check the error contents as described in the User's Manual (Basic) and take the
corresponding action.
• Checking of mode switching designation contents for buffer memory mode switching area and writing of mode
switching designation contents within the range that can be designated.
• Re-execution of mode switching
*3 After checking that mode switching was completed normally, inform all the connected devices that data communications
are possible and restart data communications.
To check the Q series C24 mode (communication protocol, transmission specifications) after switching, read the buffer
memories (addresses: 252H to 253H, 262H to 263H) described in the User's Manual (Basic).
*2
*3
*1
X6/XD
XE/XF
X1E
Y2/Y9
FROM
TO
TO
Mode switching in progress
CH ERR. communication error
Q series C24 ready
Switch setting error,
mode switching error storage area
(address 203H)
Data
communications
possible
Default value change
(Performed only when necessary)
Data communications impossible Data communicationspossible
(Only when normal)
Buffer memory special applications area
Data communications initialization
setting areas described in
User's Manual (Basic)
Addresses 93H to 121H/133H to 1C1H
Mode switching request
Mode switching area
(address 90H to 91H/130H to 131H)
Approx. 400 ms