Bfm#109: Minimum Peak Value Resetting / Bfm#119: Maximum Peak Value Resetting; Bfm#125: Peak Value Automatic Transfer To First Data Register Specification - Mitsubishi Electric MELSEC-FX3S Series Manual

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3S 3G 3GC 3U
FX -4AD/FX -4AD (4-channel Analog Input)
3U 3UC

5.4.20 BFM#109: Minimum peak value resetting / BFM#119: Maximum peak value resetting

BFM#109 can reset the minimum peak value (BFM#101 to #104), and BFM#119 can reset the maximum
peak value (BFM#111 to #114).
Channel numbers are assigned to the bits of BFM#109 and #119 to specify the channel to be subject to peak
value resetting.
Turn on each bit to reset the peak value of the corresponding channel.
1. BFM#109/#119 bits Channel number assignment
Bit No.
b0 Channel-1 minimum peak value (BFM#101) resetting
b1 Channel-2 minimum peak value (BFM#102) resetting
b2 Channel-3 minimum peak value (BFM#103) resetting
b3 Channel-4 minimum peak value (BFM#104) resetting
b4 to b15 Not used.
Two or more bits can be turned on at a time.

5.4.21 BFM#125: Peak value automatic transfer to first data register specification

If the automatic transfer to first data register is specified in BFM#125, the minimum peak value (BFM#101 to
#104) and the maximum peak value (BFM#111 to #114) will be automatically transferred to the specified data
registers (8 points (registers) starting from the first data register specified).
When the peak value is updated, data will be automatically transferred from the 4AD to the PLC. For this
reason, the PLC does not need any program for reading the data, and the scan time of the PLC can be
shortened.
→ For a detailed description of the minimum peak value (BFM#101 to #104) and the maximum peak
1. If "BFM#125 = K200 (initial value)"
Data will be transferred to D200 to D207 (8 points).
Specified data register
D200
D201
D202
D203
D204
D205
D206
D207
2. Caution regarding peak value automatic transfer-to first data register specification
• If data registers are already specified for the other automatic transfer functions, do not specify the same
data registers.
• Be sure to turn on the peak value automatic transfer function (b4 of BFM#22) and the peak value holding
function (b3 of BFM#22).
• The data written to BFM#125 will be retained in the EEPROM.
B-42
PLC User's Manual - Analog Control Edition
3UC
BFM#109
Channel-1 minimum peak value (BFM#101)
Channel-2 minimum peak value (BFM#102)
Channel-3 minimum peak value (BFM#103)
Channel-4 minimum peak value (BFM#104)
Channel-1 maximum peak value (BFM#111)
Channel-2 maximum peak value (BFM#112)
Channel-3 maximum peak value (BFM#113)
Channel-4 maximum peak value (BFM#114)
Numeric data type: Hexadecimal (H)
Description
Channel-1 maximum peak value (BFM#111) resetting
Channel-2 maximum peak value (BFM#112) resetting
Channel-3 maximum peak value (BFM#113) resetting
Channel-4 maximum peak value (BFM#114) resetting
value (BFM#111 to #114), refer to Subsection 5.4.19.
Description
5 Buffer Memory (BFM)
5.4 Buffer Memory Details
Initial value: H0000
BFM#119
Setting range: 0 to 7992
Initial value (at delivery) : K200
Numeric data type: Decimal (K)