Toshiba GR200 Series Instruction Manual

Also see for GRB200: Instruction manual

6F2S1931 (0.20)Centralized GRB200(Soft: 030, 031, 032, 033, 034)- 519 -carried out during a value is setting for the [DownTime]. The user should considerthe setting approach for [UpTime] in the same manner as when setting [DownTime].3 The auto-negotiation function is executed when the 100Base-TX modules establishcommunication over the communications network. The auto-negotiation functionselects a mode for communication; the auto-negotiation function adjusts thecommunication speed. In the case of a link-down condition, the auto-negotiationfunction 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 canapply a setting for [DownTime] for any value of time less than that required by theauto-negotiation function in response to the system requirement (i.e. the user canset [DownTime] to be zero milliseconds). In this case, switching between theprimary and secondary ports is performed immediately i.e. prior to the auto-negotiation function running. If switching between ports is not required before thecompletion of the auto-negotiation function, the user can set the setting[DownTime] longer than the time required by the auto-negotiation function. Theuser can consider the setting for [UpTime] in the same manner as when setting[DownTime].(v) PLC switchingCompulsory signals may be used to switch the ports. For example, if a compulsory signal isissued via PLC connection point “CH1_CH_CHG”, communication is switched from Port A toPort B. On the other hand, changing from Port B to Port A can be executed upon the receptionof a signal via PLC signal “CH2_CH_CHG”.(vi) MonitorLCD screen: The user can examine the statuses about the communion modules bythe 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 ChapterUser interface: Monitoring sub-menu.PortStatus10:48 1/2*Port1_Link UPPort2_Link DOWNPortStatus10:48 1/2*Port1_Link UPPort2_Link UPPort 1 (i.e., Port A) is connected.Port 2 (i.e., Port B) is not connected.Ports 1&2 (i.e., Port A&B) are connected.Figure 10.2-2 Communication status