Micrologix 1100

Can anybody help me on how to do wiring on PLC 1100. I am confuse on last 3inputs namely com, (V1+) and (V2+) and not sure where to connect these terminals.

What is the full part number? 1763-L16xxx, look on the side of the CPU and tell us what the xxx is

It is L16BWA

See attached figure

They are your analog inputs, the first one is your common (-) to the other two channels (+)

Here is the user install manual http://literature.rockwellautomation.com/idc/groups/literature/documents/in/1763-in001_-en-p.pdf

This one will also help http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1763-um001_-en-p.pdf

Page 43

Do I still need to use them when I have analog module attached.

kbasnet said:

Do I still need to use them when I have analog module attached.

Click to expand...

No only if you want to... the addressing will be different with the module but that will be the only thing different

Excellent. Thank you very much.

Your welcome...glad we could help

I believe that the onboard analog inputs have significantly less resolution than expansion modules.

The onboard analog inputs are 10-bit resolution and have a range of 0 to 10 V = 0 to 1023 integer counts.

A 1762-NI4, by contrast, has a resolution of 15 bits, with a range of -10.5 to +10.5 V = -32768 to +32767 counts.

Ken Roach said:

A 1762-NI4, by contrast,

Click to expand...

Hi Ken,

Its obvious you know much more then I care to learn but I think you have the part number wrong, should that not be a IF4 and not the NI4 ?

geniusintraining said:

Hi Ken,

Its obvious you know much more then I care to learn but I think you have the part number wrong, should that not be a IF4 and not the NI4 ?

Click to expand...

git,

I think Ken was accidentally referring to the 1746-NI4 for the SLC Family.(Link)

The 1762-IF4 (Link) is correct for the MicroLogix 1100, 1200 & 1400 controllers.

An easy mistake to make when you have many cat. no.'s floating around your head, as I'm sure Ken does!

G.

Geospark said:

I think Ken was accidentally referring to

Click to expand...

Hi George,

I know.... I was just waiting the past 9 years to correct him

Now I can rest in peace

Ken Roach said:

I believe that the onboard analog inputs have significantly less resolution than expansion modules.

The onboard analog inputs are 10-bit resolution and have a range of 0 to 10 V = 0 to 1023 integer counts.

A 1762-NI4, by contrast, has a resolution of 15 bits, with a range of -10.5 to +10.5 V = -32768 to +32767 counts.

Click to expand...

Is that just the 1100? because the 1400 is 12-bit.

FactoryTalktotheHand said:

Is that just the 1100? because the 1400 is 12-bit.

Click to expand...

Yes, in fact, only the ML1100 uses 10 bit analog resolution.

You have to be careful when reading analog I/O specs. You may see "Type of Data" quoted as "10-bit unsigned integer". This is not the resolution. However, in the case of the ML1100, the "Input Resolution" is also "10 bit".

Furthermore, the difference in resolution of embedded analog signals is not just dependant on which controller you choose, such as 1000, 1100, 1400, etc. Within certain controllers, it can also be dependant on whether it's an analog input or output, and or which input filter rate is selected.

For instance, some models of the ML1000 offer...

4 analog inputs:
Voltage input range: -10.5 to +10.5Vdc - 1LSB
Current input range: -21 to +21mA - 1LSB
Data range: -32,768 to +32,767
Data type: 16-bit signed integer
Resolution: 16 bit up to 60Hz input filter rate (15-bit @ 250Hz)

Notice that the data type will always be 16-bit signed integer, but the input resolution could be 16 bit or 15 bit.

Now look at the ML1000's analog output...

1 analog output:
Voltage output range: 0 to 10Vdc - 1LSB
Current output range: 4 to 20mA - 1LSB
Data range: 0 to +32,767
Data type: 16-bit signed integer
Resolution: 15 bit

Here we can see the difference in resolution between an analog input and an analog output on the same controller. The default input resolution is 16 bit, but it's fixed at 15 bit for the output.

------------------------------

Each model of ML1100 offers...

2 analog inputs:
Voltage input range: 0 to 10Vdc - 1LSB
Current input range: none
Data range: 0 to +1023
Data type: 10-bit unsigned integer
Resolution: 10 bit

No analog outputs.

------------------------------

Some models of the ML1400 offer...

4 analog inputs:
Voltage range: 0 to 10Vdc - 1LSB
Current range: none
Data range: 0 to +4095
Data type: 12-bit unsigned integer
Resolution: 12 bit

2 analog outputs:
Voltage range: 0 to 10Vdc - 1LSB
Current range: none
Data range: 0 to +4095
Data type: 12-bit unsigned integer
Resolution: 12 bit

------------------------------

The ML1200 and ML1500 offer no embedded analog I/O.


G.