If an I/O is mapped to an I/O number (I12 to I15, Q6 to Q15) that does not exist in the LT-3200 Series, the following error message will appear.
If too many EX modules are connected, the following error message will appear.
Power for the analog module should be separate from the LT unit's power supply. When turning the LT unit ON, first supply the module with power for 1 second or longer before you turn ON the LT unit. The display unit may not operate correctly if it is restarted too quickly.
When using the analog module (set up with 4 to 20 mA), and signals are less than 4 mA or greater than 20 mA, an abnormal data error message displays. In this scenario, inputs retain their previous values before the error.
Internal communication between the LT unit and EX module may experience a maximum delay of scan time + 20 milliseconds.
In addition, because the EX module (hardware) also has a delay, to calculate the actual delay time for inputs and outputs, you need to add the EX module delay time.
The following analog modules do not detect analog external power errors. For input modules, errors are detected as an input data error.
EXM-AMI4LT
EXM-ARI8LT
EXM-AVO2HT
EXM-AMM6HT
On the EXM-AMI4LT, when using inputs less than the Lower Limit for the Input Range, an input range error is not detected unless the voltage setting is about -1 V and current setting is about -4 mA. Using inputs less than the lower limit could influence other CH, and lower their input values.
The number of Connectable EX modules
The number of EX modules that can be connected differs depending on the display or EX module type used. Please refer to the following table for details.
Series |
Number of units |
Connectable EX Modules |
LT-3200 Series |
1 |
All EX modules |
2 |
EX module in group A, B and C, as below |
|
LT-3300 Series |
1 |
All EX modules |
2 |
EX module in group A, B, C, as below |
|
3 |
EX module in group A and B, as below |
EX Modules in Each Group
Group |
EX Module Name |
A |
EXM-DDO16UK EXM-DDO16TK |
B |
EXM-DDI8DT EXM-DDI16DT EXM-DDO8UT EXM-DDO8TT EXM-DRA8RT EXM-DRA16RT EXM-DMM8DRT EXM-AMI2HT EXM-AMI4LT EXM-AMO1HT EXM-AVO2HT EXM-AMM3HT EXM-ALM3LT EXM-AMM6HT |
C |
- |
D |
EXM-DMM24DRF EXM-ARI8LT |
Change from LT-3300 Series to LT-3200 Series
If an I/O is mapped to an I/O number (I12 to I15, Q6 to Q15) that does not exist in the LT-3200 Series, the following error message will appear.
If too many EX modules are connected, the following error message will appear.