Module Reading (Array Type) (G3F-Tc4A:tc4Ard, G4F- Tc2A/G6F-Tc2A:tc2Ard) - LG G3F-TC4A User Manual

Chapter 4. FUNCTION BLOCKS
4.2.2 Module Reading (Array type) (G3F-TC4A : TC4ARD, G4F-TC2A/G6F-TC2A : TC2ARD)
The Array type module reading function block executes all channels of the thermocouple input module
in batch processing. If a channel is enabled then the function block outputs the temperature conversion
value to the output value TEMP.
Function
I/O
Block
I
O
G4F-TC2A/
G6F-TC2A
REMARK
∗Note 1: The numbers of Array are 16 in G3F-TC4A, 4 in G4F-TC2A/G6F-TC2A
Data
Variable
Type
Function block execution request area
- Used to request an execution of the reading function block
REQ BOOL
- If the conditions connected with this area are established while the program is
running and "0" changes into "1", the reading function block is executed.
Base location No.
- Used to write the base No. where the thermocouple input module is mounted.
BASE USINT
- Setting range: GM1 series(0~31), GM2 series(0~7), GM3/4 series(0-3), GM6
series(0-1)
Slot location No.
SLOT USINT - Used to write the slot No. where the thermocouple input module is mounted.
- Setting range: 0~7
Run channel enable/disable specification
BOOL
- Used to enable or disable a channeI for run.
CH
[Array]
- Specify "1" for enabling, and "0" for disabling
*Note 1
Function block finished execution status
- "1" is output when the reading function block is finished with no error and "1"
DONE BOOL
remains until next execution. If an error occur, '0' is displayed and the operation
enters into the stop state.
Error status indication area
USINT
- Used to output the error No. when it occurs during reading function block
STAT
execution.
- For description of errors, refer to Section 4.4
Run channel status indication area
BOOL
ACT - After the reading function block is finished with no error, "1" is output if the
[Array]
channel is in normal state. But "0" is output for the disabled channels.
*Note 1
BOOL Run channel error indication area
ALM
[Array] - "1" is outputted when error occurs for each run channel.
*Note 1
Run channel error code area
-Outputs the following code for each channel coded if error occurred.
USINT
ALM_ 0: Normal
[Array]
CODE 16: Disconnection detected
*Note 1
17: Out-of-the-measuring-range error
18: Reference junction compensation device error
Temperature conversion value output area
- The CPU module reads the temperature conversion value of the corresponding
channel from the thermocouple input module and outputs it to this area.
INT
- The temperature conversion value of each channel is 10 times than the real
TEMP
[Array]
temperature value.
*Note 1
- (Example: Temperature conversion value 1234 → Real temperature value
123.4°C)
Digital conversion value output area
- The CPU module reads the digital conversion value of the corresponding channel
from the thermocouple input module and outputs it to this area.
- The temperature conversion value of each channel within its measuring
temperature range is converted into a digital value within 0 to 16000 and it is
outputted to this area.
INT
-
SCAL
[Array]
*Note 1
- The output value through digital conversion can be used as a PV of the PID
control module.
Description
The Value read from the output variable SCAL.
16000
Overall measuring
temperature range
4 - 3
× (Temperature conversion value –
Minimum measuring temperature)
.