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User Program Upload
When the user program containing the initial parameters of the PID modules is uploaded from the CPU
module, the initial values will be restored. The parameters saved in the PID module will not be read.
How to restore data register values when a keep data error has occurred
If more than 30 days pass since the power to the CPU module is turned off, values stored in the data
registers will be lost. When the data register values are lost, after the power is turned on, restore the PID
module parameters in the data registers of the CPU module using either of the following methods, and
then enable the control of the PID module.
Method 1: Use the parameters stored in the PID module
The parameters stored in the PID module can be read out and stored in the data registers of the CPU
module with one of the following procedures:
Procedure 1: Using WindLDR
1. Open Expansion Modules Configuration dialog box in WindLDR.
2. Select the slot number of the connected PID module and open the PID Module Configuration dialog
box.
3. Click on Read All Parameters button to read all parameters from the PID module.
4. Configure the set point (SP) and the manual mode output manipulated variable in the PID Module
Configuration dialog box. *1
5. Click on Write All Parameters button.
When the control of the PID module is enabled, the PID module will start operating with the
downloaded parameters.
Procedure 2: Using the user program
1. Turn off to on the reading all parameters relay (control relay + 0).
2. Configure the set point (SP) and the manual mode output manipulated variable if necessary. *1
When the control of the PID module is enabled, the PID module will start operating with the
configured parameters.
*1: Because the block 1 parameters are not saved in the PID module, it is required to configure those parameters.
Method 2: Use the default parameters stored in the ROM of the CPU module
When the PID module parameters are configured in the PID Module Configuration dialog box and the
user program is downloaded to the CPU module, the PID module parameters (initial values) will be
saved in ROM of the CPU module. Those initial values can be loaded to the data registers in the CPU
module, and the PID module can be operated with those initial values with the following procedure:
1. Turn off to on the loading initial values relay (control relay + 1).
2. Turn off to on the writing all parameters relay (control relay + 2).
When the control of the PID module is enabled, the PID module will start operating with the default
values.
FC5A MicroSmart PID Module User's Manual FC9Y-B1283
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
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