P1-04THM

Thermocouple Temperature and Voltage Input

This function returns the temperature reported by the channel as a floating point value.

float temperature = P1.readTemperature(1, 2); // Reads slot 1 channel 2 of the P1-04THM 

Note: While this module can be used for voltage inputs, you still need to use the "readTemperature" function as the voltage is reported as a floating point number.

Configuration Tool

Compatible Functions

Module Configuration and Status Tables

We recommend using the status functions and configuration tool. These tables are provided as additional reference.

Module Status Data

Bytes (MSB) 7 6 5 4 3 2 1 0 (LSB) Description
Byte 0 x x x x x x x x bits 0-7 are undefined
Byte 1 x x x x x x x x bits 0-7 are undefined
Byte 2 x x x x x x x x bits 0-7 are undefined
Byte 3 x x x x x 2 x 0 bit 2 - Module not ready
bit 1 is undefined
bit 0 - Module diagnostics failure
Byte 4 x x x x x x x x bits 0-7 are undefined
Byte 5 x x x x 3 2 1 0 bit 3 - Burnout error on channel 4
bit 2 - Burnout error on channel 3
bit 1 - Burnout error on channel 2
bit 0 - Burnout error on channel 1
Byte 6 x x x x x x x x bits 0-7 are undefined
Byte 7 x x x x 3 2 1 0 bit 3 - Under range error on channel 4
bit 2 - Under range error on channel 3
bit 1 - Under range error on channel 2
bit 0 - Under range error on channel 1
Byte 8 x x x x x x x x bits 0-7 are undefined
Byte 9 x x x x x x x x bits 0-7 are undefined
Byte 10 x x x x x x x x bits 0-7 are undefined
Byte 11 x x x x 3 2 1 0 bit 3 - Over range error on channel 4
bit 2 - Over range error on channel 3
bit 1 - Over range error on channel 2
bit 0 - Over range error on channel 1

Module Configuration Data

Default values are in bold.

Offset Description Allowable Values Value Description
Bytes 00-01 Channel enable 0x4000 Enable channel 1
0x4001 Enable channels 1 and 2
0x4002 Enable channels 1-3
0x4003 Enable channels 1-4
Bytes 02-03 Burnout and Units 0x6001 Low side Burnout (min scale)/Temp in degrees C
0x6003 High side Burnout (max scale)/Temp in degrees C
0x6005 Low side Burnout (min scale)/Temp in degrees F
0x6007 High side Burnout (max scale)/Temp in degrees F
Bytes 04-05 Channel 1 Range 0x210r
r = 0 J
r = 1 K
r = 2 E
r = 3 R
r = 4 S
r = 5 T
r = 6 B
r = 7 N
r = 8 C
r = 9 0-39mV
r = A +/-39mV
r = B +/-78mV
r = C 0-156mV
r = D +/-156mV
r = E 0-1.25V
Bytes 06-07 Channel 2 Range 0x220r See CH1
Bytes 08-09 Channel 3 Range 0x230r See CH1
Bytes 10-11 Channel 4 Range 0x240r See CH1
Bytes 12-13 Reserved 0x0000 Reserved
Bytes 14-15 Reserved 0x0000 Reserved
Bytes 16-17 Reserved 0x0000 Reserved
Bytes 18-19 Reserved 0x0000 Reserved

Channels: 4
Thermocouples Types: J, E, K, R, S, T, B, N, and C.
Voltage Ranges: 0-39.0625 mVDC, ±39.0625 mVDC, ±78.125 mVDC, 0-156.25 mVDC, ±156.25 mVDC, 0-1250 mVDC.
Resolution: Temperature: ±0.1 °C or °F Voltage: 16 bit (Formatted as a float)
Example: ReadTemperature

Additional Resources:
Data Sheet
P1-04THM on AutomationDirect.com