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11 Station Extensions/Options SIPLACE 80S-20/F4/F5 User Manual 11.9 GEM Interface 05/99 Is sue from Software Version SR.405.xx 11 - 66 l M S: Memory Stall - T he S DR compone nt of S iplace GE M tolera tes the status tha…

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SIPLACE 80S-20/F4/F5 User Manual 11 Station Extensions/Options
05/99 Issue from Software Version SR.405.xx 11.9 GEM Interface
11 - 65
The following parameters can be set:
l T3: Reply timeout
- When a primary message is sent to the host, the station waits up to T3 seconds for the secondary
message from the host.
- Range of values: 1 - 120 seconds
l T5: Connect separation timeout
- This determines the waiting time between successive attempts to establish a connection. This is only
important if the station has been configured as the ACTIVE ENTITY.
- Range of values: 1 - 240 seconds
l T6: Control transaction timeout
- When the transmitter sends a Connect.req or Linktest.req message to the host, the station waits up to
T6 seconds for the Connect.rsp or Linktest.rsp message. The TCP/IP link is then interrupted.
- Range of values: 1 - 240 seconds
l T7: NOT SELECTED timeout
- Once the TCP/IP connection has been established, the station configured as the PASSIVE ENTITY
waits up to T7 seconds for the Select.req message from the host. The TCP/IP link is then interrupted.
A successful exchange of Select.req and Select.rsp messages forms the basis for conversion of the
TCP/IP connection into an HSMS connection.
- Range of values: 1 - 240 seconds
l T8: Network intercharacter timeout
- Reception of an individual HSMS message must not take longer than T8 seconds. Otherwise the TCP/
IP link will be interrupted.
- Range of values: 1 - 120 seconds
l CE: Connection Establishment timeout
- After sending a TCP/IP connect command, a station which has been configured as an ACTIVE
ENTITY waits up to CE seconds for a connection to be established or for a status message. After this
time it is assumed that the command was not received correctly.
l CA: Circuit Assurance
- This determines the waiting time between sending successive Linktest.req messages. These mes-
sages check that the HSMS connection is working correctly. If CA=0, no Linktest.req messages are
sent.
l TG: Grace period
- While a SECS-II connection is being established, the SDR component of Siplace GEM buffers all the
messages to be sent to the host. If the SECS-II connection can be established within TG seconds, the
buffered message will be sent to the host. Otherwise they are rejected by the SDR component and
have the status F_DELV.
11 Station Extensions/Options SIPLACE 80S-20/F4/F5 User Manual
11.9 GEM Interface 05/99 Issue from Software Version SR.405.xx
11 - 66
l MS: Memory Stall
- The SDR component of Siplace GEM tolerates the status that all internal buffers are full and that the
host is attempting to send further data packets for up to MS seconds. The TCP/IP connection is then
ended in order to prevent the network becoming overloaded.
l WS: Write Stall
- The SDR component of Siplace GEM tolerates the status that data packets to be sent are not received
by the TCP/IP connection for up to WS seconds. The TCP/IP link is then ended.
l IP address:
- for the connection to the customer’s LAN
l IP screen
- for the connection to the customer’s LAN
l Port:
- TCP/IP port number for the GEM connection to the host
SIPLACE 80S-20/F4/F5 User Manual 11 Station Extensions/Options
05/99 Issue from Software Version SR.405.xx 11.9 GEM Interface
11 - 67
11.9.2.5 GEM Status Window
In the status window the user is kept informed of the status of the connection with the host. The various sta-
tuses are indicated by different background colors.
l Red
No connection
l Yellow
Setting up connection
l Green
Connection made
In addition to displaying the status of the host connection, the status window also shows the operator whether
messages have been received from the host. The envelope icon will either be lit or dark, depending on the
status. See Fig. 11.9.6
Fig. 11.9.6 GEM status window
- Key to Fig. 11.9.6
1 Status of the connection to the host (red, yellow, green) 2 No messages waiting (lit)
3 Messages waiting (dark)
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2
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