Rockwell-automation FactoryTalk ViewPoint Quick Start Guide User Manual download pdf (Page 34)

FACTORYTALK VIEWPOINT QUICK START

Set command

writes a value to a tag.

The syntax for the Set command is [&] Set [/V] <tag_name> <value|tag>

 [&] forces the command to be evaluated asynchronously, which can dramatically

improve the performance of tag writes.

 [/V] performs read-back verify on the write.

 [/V] provides an extra level of security by performing a read immediately after

the write to verify that the value was actually altered in the programmable

controller or OPC server.

 This option is useful if the communications network is in poor condition, or

susceptible to noise interference.

 If the verification fails, the error message is sent to the Factory Diagnostics

system

 <tag_name> is a relative or absolute reference to the tag whose value will be set.

 <value|tag> is a value and tag to set.

Toggle command

reads the tag's value and writes back a 0 or 1. If the value is 0,

Toggle changes it to 1; if the value is 1, Toggle changes it to 0.

The syntax for the Toggle command is Toggle [/V] <tag_name>

 [/V] performs a read immediately after the write to verify that the value was

altered in the programmable controller or server.

 This parameter is useful if the network is in poor condition or susceptible to

noise interference.

 If the verification fails, the error message is sent to the Factory Diagnostics

system.

 <tag_name> is a relative or absolute reference to an analog or digital HMI tag.

FTViewPointQS.book Page 30 Thursday, July 17, 2014 8:55 AM

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 45 46

No comments

Rockwell-automation FactoryTalk ViewPoint Quick Start Guide User Manual Page 34