IDEC MicroSmart Pentra - Manual (Page 51)

D EVICE A LLOCATION OF PID M ODULE
5-10 FC5A MicroS mart PID Module User’s Manual FC9Y-B1283
Data Register Allocation - Block 1 Write Only Parameters
The CPU module writes the following parameters stored in the data registers to the PID module every scan.
Offset from
the Control
Register
Parameter Description R/W
+20
CH0
Set Point (SP)
When the input is thermocouple or resistance thermometer:
Set point (SP) lower limit to set point (SP) upper limit
When the input is voltage or current input:
Linear conversion min. to linear conversion max.
W
+21
Manual Mode Output
Manipulated Variable
When heating/cooling control is disabled:
Output manipulated variable lower limit to output manipulated
variable upper limit
When heating/cooling control is enabled:
- Cooling output manipulated variable upper limit to heating
output manipulated variable upper limit
W
+22 Operation Parameter Refer to the table below for the operation parameters W
+23
CH1
Set Point (SP)
When the input is thermocouple or resistance thermometer:
Set point (SP) lower limit to set point (SP) upper limit
When the input is voltage or current input:
Linear conversion min. to linear conversion max.
W
+24
Manual Mode Output
Manipulated Variable Output manipulated variable lower limit to output manipulated
variable upper limit
W
+25 Operation Parameter Refer to the table below for the operation parameters W
Note: When the power to the PID module is turned off, Block 1 parameters are cleared to zero.
Operation Parameters
Bit
Operation Parameters (1 word)
Item Status Description
Bit0 Control Enable Bit
0 Control disable
1 Control enable
Bit1 Auto-tuning (AT)/Auto-Reset Bit *1
0 Auto-tuning (AT)/Auto-reset cancel
1 Auto-tuning (AT)/Auto-reset perform
Bit2 Auto/Manual Mode Bit
0 Auto mode
1 Manual mode
Bit3 Program Control Bit
0 Program control stop
1 Program control run
Bit4 Program Hold Bit *2
0 Program control run
1 Program control hold
Bit5 External SP Input Enable Bit
0 External SP input disable
1 External SP input enable
Bit6 Advance Next Step Bit *3
0 No action
1 Program control advance next step
Bit7 Advance Previous Step Bit *4
0 No action
1 Program control advance previous step
Bit8 to
Bit15
Reserved 0 Fixed value 0
*1: Once auto-reset is performed, it cannot be cancelled during its performance.
*2: The program control is suspended while the program hold bit is on.
*3: During the program control, the current step is terminated and the program control is proceeded to the start of the
next step when the advance next step bit is turned off to on.
*4: During the program control, the progression of the program control is moved back when the advance previous step
bit is turned off to on. If the elapsed time in the current step is less than 1 minute, the program control goes back to
the start of the previous step. If the elapsed time in the current step is more than or equal to 1 minute, the program
control goes back to the start of the current step. Even when the advance previous step is executed at Step 0, the
program control does not move back to Step 9 regardless of the program end action.