Toshiba GR200 Series Instruction Manual page 1167

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zero for [DownTime] so that the switching of the ports will be performed

immediately; conversely, the user can set any value less than 3000ms in order that

the system need not experience chattering failures if the optical fiber were not

connected securely. Switching between the primary and the secondary ports is not

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].

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

PLC switching

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".

the monitoring function. Figure 11.2-2 shows the port status about the modules; terms

'Up' and 'Down' mean running and stopping, respectively. For menus operations, see

The user can examine the statuses about the communion modules by

User interface: Monitoring sub-menu

6F2S1915 (0.46)

GRZ200 (Soft 031 & 032)