Panasonic FP0 User Manual page 37

FP0
Notes
3) Precision of calender timer:
At 0 C/32 F, less than 139 second error per month.
At 25 C/77 F, less than 72 seconds error per month.
At 55 C/131 F, less than 169 seconds error per month.
This accuracy is considered to be the worst fluctuation coefficient
value based on fluctuations in the normal voltage of 5V and the
battery backup voltage of 3V. Also, F157 and F158 (time/date
addition and subtraction instructions) cannot be used.
4) When using the RS232C port for communication, we recommend
using resend processing. The driver IC for the RS232C is in full
conformance with EIA/TIA−232E and CCITT V.28 standards.
5) The combinations 1 phase × 2 channels and 2 phases × 1 channel
are also possible for the high−speed counter.
6) The internal relay, data register, and timer/counter hold areas of the
T32CT control unit (10 k step type) can be changed by the system
registers. The number of points in the table is the value when the
system registers are initial values.
7) The max. counting speed (10kHz) is the counting speed with a rated
input voltage of 24V DC and an ambient temperature of 25°C. The
counting speed (frequency) will decrease depending on the voltage
and temperature.
8) If both reset inputs X0 and X1 are reset, X2 will be the reset input of
X1. In the same way, for X3 and X4, X5 acts as the reset input of X4.
9) With a CPU of Ver. 1.2 or a subsequent version, the frequency will be
0.15Hz to 1kHz.
10) The maximum is 9.5kHz when the positioning control instruction
(F168) is executed.
11) Precautions when using the battery backup function Secondary
(chargeable) battery is used as backup battery in the FP0 T32C
control unit. The battery is not charged before the unit is shipped,
so please make sure that the built−in backup battery have been
charged before using the unit.
12) The program, system resisters and the hold type areas (internal
relay, data register and counter) are backed up by the built in
EEPROM.
13) The possible number of write times by the EEP−ROM write
instruction is 100,000 or less.
14) The possible number of write times by the EEP−ROM write
instruction is 10,000 or less.
15) If the power supply is turned off while the P13 instruction is being
executed, the data written by the P13 instruction may not be written
in the EEPROM properly. Also, the area where the internal relays,
data registers and timer/counter are held may not be held properly.
Do not turn off the power supply while the P13 instruction is being
executed.
Optional Memory
2.2 Specifications
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