Toshiba GR200 Series Instruction Manual page 533

carried out during a value is setting for the [DownTime]. The user should consider
the setting approach for [UpTime] in the same manner as when setting [DownTime].
3 The auto-negotiation function is executed when the 100Base-TX modules establish
communication over the communications network. The auto-negotiation function
selects a mode for communication; the auto-negotiation function adjusts the
communication speed. In the case of a link-down condition, the auto-negotiation
function will run again immediately. The link-down condition continues until auto-
negotiation has been completed (it may continue for 1 or 2 seconds). The user can
apply a setting for [DownTime] for any value of time less than that required by the
auto-negotiation function in response to the system requirement (i.e. the user can
set [DownTime] to be zero milliseconds). In this case, switching between the
primary and secondary ports is performed immediately i.e. prior to the auto-
negotiation function running. If switching between ports is not required before the
completion of the auto-negotiation function, the user can set the setting
[DownTime] longer than the time required by the auto-negotiation function. The
user can consider the setting for [UpTime] in the same manner as when setting
[DownTime].
PLC switching
(v)
Compulsory signals may be used to switch the ports. For example, if a compulsory signal is
issued via PLC connection point "CH1_CH_CHG", communication is switched from Port A to
Port B. On the other hand, changing from Port B to Port A can be executed upon the reception
of a signal via PLC signal "CH2_CH_CHG".
Monitor
(vi)
LCD screen:
the monitoring function. Figure 10.2-2 shows the port status about the modules;
terms 'Up' and 'Down' mean running and stopping, respectively. For menus operations,
see Chapter
PortStatus
10:48
*Port1_Link
Port2_Link
Port 1 (i.e., Port A) is connected.
Port 2 (i.e., Port B) is not connected.
The user can examine the statuses about the communion modules by
User interface: Monitoring sub-menu
1/2
UP
DOWN
Ports 1&2 (i.e., Port A&B) are connected.
Figure 10.2-2 Communication status
- 519 -
.
PortStatus
10:48 1/2
*Port1_Link UP
Port2_Link UP
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)
6F2S1931 (0.20)