Hitachi EH-150 Applications Manual page 72

(b) CMCR.CMn = 1 ("Close mode control" is enabled. "n" is ASR connection number)
Even if EH-ETH2 receives a request to close from other station, EH-ETH2 does not close the connection unless a
user program is executed for closing the connection.
The time chart to close connection 4 is shown in Figure 7.12.
Register name
C4CSR .OPC4
C4CSR .CRO4
CNCR .CLS4
Figure 7.12
(1) When EH-ETH2 receives a request to close connection 4 from another station, "Close requested bit" goes high.
( C4CSR .CRO4 is 1)
-------------------------------------------------------------------------------- Receiving a request to close from another station
(2) Confirm the connection opened ( C4CSR .OPC4 is 1) and the request received ( C4CSR .CRO4 is 1), and then set 1
to CNCR .CLS4.
---------------------------------------------------------------------------------------------------------------------- Request to close
(3) When EH-ETH2 receives a request to close from user program, EH-ETH2 closes the connection 4 and clear
C4CSR .OPC4.
------------------------------------------------------------------------ Clear "Request to close bit" and close the connection.
(4) Confirm the connection closed ( C4CSR .OPC4 is 0) and cancel the request to close ( CNCR .CLS4 is 0)
----------------------------------------------------------------------------------------------------- Cancellation of request to close
Chapter 7 Automatic Sending/Receiving function (ASR)
Request from another station
(1) (2)
: By user, : By EH-ETH2
Procedure to close connection (3)
7-14
(4)
(3)