List four ways to communicate between a personal computer and a PLC.
What will be an ideal response?
There are many ways to communicate between a personal computer and a PLC. The specific ControlLogix or CompactLogix available hardware dictates your communications options, some of which are listed here:
• Direct serial connection
• USB to serial converter
• Ethernet communications at 10 M
• Ethernet/IP communications at 100 M
• USB to a Series 7 controller or CompactLogix 5370 series PLC
• ControlNet
• Data Highway Plus
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The IP address 10.0.0.0 is a Class _____ address and with a CIDR of /13 has a subnet mask of ____ with ____ subnets and ____ hosts/subnet.
a. A, 255.248.0.0, 32, 524286 b. A, 255.255.255.248. 2097150, 6 c. A, 255.255.0.0, 62, 262142 d. None of these answers is correct.
What is the potential number of IPv4 addresses available?
a. 65,536 b. 16,777,216 c. 4,294,967,296 d. infinite
The two basic types of validation rules are ________
A) field properties and field validation rules B) data validation rule and validation text C) data accuracy rules and record validation rules D) field validation rules and record validation rules
A person using webmail may be able to use a program such as ________ to connect to the server and thus download messages to work with offline
Fill in the blank(s) with correct word