C40K-CDR-A Omron, C40K-CDR-A Datasheet - Page 33

• Manufacturer Part Number: C40K-CDR-A
• Description: PROGRAMMABLE CONTROLLER CPU
• Manufacturer: Omron

Specifications of C40K-CDR-A

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Special Relay (SR) Area
3-4
3-4-1
3-4-2
3-4-3
3-4-4
Special Relay (SR) Area
Battery Alarm Flag
Cycle Time Error Flag
High-speed Drum Counter Reset
Clock Pulse Bits
The SR area contains flags and control bits used for monitoring system op-
eration, accessing clock pulses, and signalling errors. SR area word ad-
dresses range from 18 through 19; bit addresses, from 1804 through 1907.
The following table lists the functions of SR area flags and control bits. Most
of these bits are described in more detail following the table.
Unless otherwise stated, flags are OFF until the specified condition arises,
when they are turned ON. Bits 1903 to 1907 are turned OFF when END is
executed at the end of each program cycle, and thus cannot be monitored on
the Programming Console. Other control bits are OFF until set by the user.
SR bit 1808 turns ON if the voltage of the CPU backup battery drops. A volt-
age drop can be indicated by connecting the output of this bit to an external
indicating device such as a LED. This bit can be used in programming to acti-
vate an external warning for a low battery.
SR bit 1809 turns ON if the cycle time exceeds 100 ms. This bit is turned ON
when the cycle time is between 100 and 130 ms. The PC will still operate but
timing may become inaccurate. The PC will stop operating if the execution
time exceeds 130 ms.
SR bit 1810 turns ON for one cycle time when the hard reset signal (input
0001) is turned ON.
Three clock pulses are available to control program timing. Each clock pulse
bit is ON for the first half of the rated pulse time, then OFF for the second
half. In other words, each clock pulse has a duty factor of 50%.
18
19
Word
04
05
06
07
08
09
10
11
12
13
14
15
00
01
02
03
04
05
06
07
Bit
RDM(60) Reset Bit
RDM(60) Count Input Bit
RDM(60) Up/Down Selection Bit
HDM(61) Reset Bit
Battery Alarm flag
Cycle Time Error flag
High Speed Counter Reset
Step flag
Always OFF flag
Always ON flag
Always OFF flag
First Cycle flag
0.1-second Clock Pulse
0.2-second Clock Pulse
1-second Clock Pulse
Error (ER) flag
Carry (CY) flag
Greater Than (GR) flag
Equals (EQ) flag
Less Than (LE) flag
Function
Section 3-4
21