how to compare data in different cell of datagridview and giving the output?

hi guys, i currently using c# interface as a medium to communicate between excel file and PLC. what i trying to do is when i connect to my PLC with interface, my code will read the PLC status and show the output(ON/OFF) in datagridview. whenever i change the PLC value, output inside datagridview will change too. i was successfully try in one value. but, the problem is let say if i got 100 different value need to read from PLC and show the output to datagridview , what should i do ? 

this is coding for one value only

private void timer1_Tick(object sender, EventArgs e)        
        {           
            try
            {                
                    if (adsClient.ReadAny(GVariable.out1, typeof(Boolean)).ToString() == "True")
                    {
                        dataGridView1.Rows[0].Cells[2].Value ="ON";
                        dataGridView1.Rows[0].Cells[2].Style.ForeColor = Color.Green;                   
                    }
                    else
                    {
                        dataGridView1.Rows[0].Cells[2].Value = "OFF";
                        dataGridView1.Rows[0].Cells[2].Style.ForeColor = Color.Red;                    
                    }                              
            }
            catch (Exception err)
            {
                MessageBox.Show(err.Message);
            }
        }

GVariable.out1 is the value read from my PLC.

second, is it possible to link my status with my excel data so that when i update my excel file , my status will change too.

i have tried my best to think what method to do but still no idea, someone please help..thank alot !!