Analog I/O Functions (Cpm1/Cpm1A/Cpm2A/Cpm2C Only); Temperature Sensor Input Functions (Cpm1A/Cpm2A/Cpm2C Only); Compobus/S I/O Slave Functions (Cpm1A/Cpm2A/Cpm2C Only) - Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual

CompoBus/S I/O Slave Functions (CPM1A/CPM2A/CPM2C Only)

Frequency Error
2-9

Analog I/O Functions (CPM1/CPM1A/CPM2A/CPM2C Only)

2-10 Temperature Sensor Input Functions
(CPM1A/CPM2A/CPM2C Only)
2-11 CompoBus/S I/O Slave Functions
(CPM1A/CPM2A/CPM2C Only)
There will be an error between the frequencies of the input pulse and output
pulse, as described below. The error consists of error in the input pulse frequen-
cy measurement and error in the output pulse frequency.
Input Pulse Frequency Measurement Error
The error in measuring the frequency of the input pulse depends on the setting in
DM 6642, as shown below. If a multiplication factor is specified for synchronized
pulse control, the error given in the table must also be multiplied by the same
factor.
Setting of
DM 6642 bits 08 to 15
02
03
04
Output Pulse Frequency Error
There will be an error between the frequency of the output pulse and the set fre-
quency of less than 1% due to internal processing error.
Example
DM 6642 bits 08 to 15: 4 (frequency range: 300 Hz to 20 kHz)
Multiplication factor:
Input frequency:
If synchronized pulse control is performed under the above conditions, there will
be an error of 10 Hz in measuring the frequency range of the input pulse. The
input frequency will thus be 990 to 1010 Hz. The multiplication factor of 300%,
however, would make this 2970 to 3030 Hz. There would also be an error of 1%
in the frequency of the output pulse, so the output would be in the range 2940 to
3060 Hz.
One or more Analog I/O Units can be connected to the PC to provide analog I/O.
One Analog I/O Unit allows 2 analog inputs and 1 analog output. Refer to 3-1
Analog I/O Units for details.
Temperature Sensor Units can be added to directly input temperature sensor
inputs into the PC. Temperature Sensor Units are available for either thermo-
couple or platinum resistance thermometer inputs.
For the CPM1A or CPM2A, up to three CPM1A-TS001/101 Temperature Sensor
Units or one CPM1A-TS002/102 Temperature Sensor Unit can be connected.
Up to 6 temperature inputs are possible for one PC.
For the CPM2C, up to four CPM2C-TS001/101 Temperature Sensor Units can
be connected, enabling up to 8 temperature inputs for one PC.
Up to three Units can be connected for the CPM2C-S.
The PC can function as a Slave to a CompoBus/S Master Unit (or SRM1 Compo-
Bus/S Master Control Unit) when a CompoBus/S I/O Link Unit is connected. Re-
fer to 3-3 CompoBus/S I/O Link Unit for details.
Frequency range
10 to 500 Hz
20 Hz to 1 kHz
300 Hz to 20 kHz
300%
1 kHz (error: 0%)
Section 2-11
Error
1 Hz
1 Hz
10 Hz
147