Emerson E300 Series - Page 276

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276 E300 Design Guide
Issue Number: 1
See T5 T6 Analog Input 1 (F35).
Each analog input has a resolution of 11 bits plus sign. The inputs can operate in different modes (defined by T8 Analog Input 3 Mode (F52) for
analog input 3). These modes include voltage and thermistor modes. The available modes depend on the hardware configuration and are given in the
table below.
The "Input Level" is defined for the different modes in the table below.
T8 Analog Input 3 (F37) is derived as follows:
Limits
A
1
is the value after the minimum and maximum limits are applied.
If T8 Analog Input 3 Minimum (F57) ≥ T8 Analog Input 3 Maximum (F58) then:
A
1
= 0.00 % whatever the input level.
If T8 Analog Input 3 Minimum (F57) < 0.00 % and T8 Analog Input 3 Maximum (F58) > 0.00 % then:
A
1
= Input Level x (100.00 % / T8 Analog Input 3 Maximum (F58))
A
1
is then limited between -100 % and +100 %.
Otherwise:
Input Level is limited between T8 Analog Input 3 Minimum (F57) and T8 Analog Input 3 Maximum (F58) A
1
= [Input Level - T8 Analog Input 3
Minimum (F57)] x 100.00 % / (T8 Analog Input 3 Maximum (F58) - T8 Analog Input 3 Minimum (F57))
For thermistor modes it should be noted that T8 Analog Input 3 Minimum (F57) and T8 Analog Input 3 Maximum (F58) have no effect and that the
input resistance is limited between 0 and 5 K Ohms.
F36 T7 Analog Input 2
Mode Open-Loop, RFC-A, RFC-S
Minimum -100.00 Maximum 100.00
Default Units %
Type 16 Bit Volatile Update Rate 4 ms write
Display Format Standard Decimal Places 2
Coding RO, Fl, ND, NC, PT
F37 T5 T8 Analog Input 3
Mode Open-Loop, RFC-A, RFC-S
Minimum -100.00 Maximum 100.00
Default Units %
Type 16 Bit Volatile Update Rate 4 ms write
Display Format Standard Decimal Places 2
Coding RO, Fl, ND, NC, PT
Internal IO Identifier (J66) Analog Input 1 Analog Input 2 Analog Input 3
0: Standard Analog and Digital I/O Bipolar Voltage, Current Bipolar Voltage, Current Bipolar Voltage, Thermistor
Mode Input Level
Voltage (Input Voltage / 10 V) x 100.00 %
Thermistor (Input resistance / 10 K Ohm) x 100 %