4

BSM Present In a dual bus system, if the Remote Drop will be located downsteam of another device that controls bus switching (either a Bus Switching Module or another Remote I/O Scanner), set this entry to YES.

Timeout Sec If either of the previous two entries is YES, and the total bus scan time is expected to exceed 100mS, set this entry to 10. This entry is equivalent to the Switch Time entry made for the Bus Controller. It is the amount of time that will be allowed for switching on a dual bus. The choices are 2.5 seconds and 10 seconds. If the Remote I/O Scanner stops receiving output data from the Bus Controller, it will wait for this specified time period before defaulting outputs in the Remote Drop.

CFG Protect After establishing the configuration for the Remote Drop, set this entry to YES to prevent changes.

Redund

Mode

Duplex Def

This entry determines the CPU redundancy mode of the system. For most applications, it will be NONE, for no CPU redundancy. The other choices are Hot Standby and Duplex. See the Bus Controller User's Manual for details. The Remote I/O Scanner can only be configured for Duplex CPU redundancy if all of its modules are discrete.

If the entry for Redund Mode above was Duplex, the Remote I/O Scanner will operate in Duplex mode. It will accept output data from two Bus Controllers, and compare the corresponding outputs. If the two outputs match, the Remote I/O Scanner sets the output to the commanded state. If they do not match, the Remote I/O Scanner sets the output to this configured default state. All outputs in the Remote Drop will use this same default state.

Redundan- cy?

Set this entry to YES if the Remote I/O Scanner will be a redundant device on the bus of its bus controller. The bus controller must also be set up for redundancy. Setting this to YES causes the configuration of this Remote I/O Scanner to be automatically associated with any ªmatchingº internal bus controller.

SNP Port Entries

These are the SNP port communications parameters. If the Remote I/O Scanner will be part of a Serial Network Protocol system, these parameters must be set to match the SNP parameters of the PLC.

Baud Rate

Defaults to 19200 bps. The other choices are 300, 600, 1200, 2400, 4800,

 

and 9600 bits per second.

Parity

The number of parity bits added to each word. The default is ODD.

 

You can also choose EVEN and NONE.

Stop Bits

All communications use at least 1 stop bit, which is the default. For

 

slower communications, select 2.

Modem TT

The modem turnaround time delay. 1 count = 1/100 second. 0 to 255

 

counts can be specified. The default is 0.

Idle Time

The maximum communications idle time, which can be 1 to 60

 

seconds. The default is 10 seconds.

For multidrop communications, a unique SNP ID is required for each device in the network. A Remote I/O Scanner automatically sets its SNP ID to the form DropXXX

Chapter 4 Configuration with Logicmaster 90±70

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GE GFK0579B user manual SNP Port Entries, Redund Mode Duplex Def
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GFK0579B specifications

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