加减计数的本质与加计数相同,计数输入信号每出现一次上升沿,计数器从0开始加"1",当计数达到设定值(PV)时,计数器的输出触点接通。计数达到设定值后如果继续输入计数信号,计数值仍然增加,输出触点保持接通状态。当现行值加到较大值32767后,如果再输入加计数信号,现行值变为-32768,再继续进行加计数。
同时,减计数输入信号也起作用,减计数输入每出现一次上升沿,计数器从现行值开始减"1"。当现行值减到较小值-32768后,如果再输入减计数信号,现行值变为 32767,再继续进行减计数。
计数器具有信号(R)输入,当信号为"1"时,现行计数值被清"0",设定值写入,输出触点强制断开。
(2) S7-200 PLC的计数器编程。S7-200 PLC的计数器梯形图与指令表编程方法如图3-49所示,图中的PV为计数设定值输入端,R为复位输入端。
倍德立(厦门)科技有限公司
销售经理:张卫东 联系电话:13055237500 座机:0592-6085900 QQ:3454941352
销售经理:杨帆 联系电话:13358371730 座机:0592-6085900 QQ: 2921696645
销售经理:叶工 联系电话:15359890861 座机:0592-6087118 QQ: 2650907184
优势品牌:
Siemens(西门子):
● 西门子S7-200CN、S7-200SMART、ET200、 S7-300 、S7-400 、6AV、6G系列备件.
● HMI 触摸屏TD200、TD400C、TP177、MP277、MP377、SMART700 、SMART1000.
● MM系列变频器、电源模块、1200模块、触摸屏、1500模块、smart模块.
● 西门子电线电缆、DP接头 、网线网卡等附件.
AB(罗克韦尔):1734/1746/ 1747/ 1756/1762系列, 承接AB罗克韦尔全系列PLC 变频器、触摸屏、软启动、伺服等业务.
Schneider(施耐德):PLC控制器、140处理器、输入输出模块、电源模块、变频器低压配件等。
P+F倍加福、Phoenix菲尼克斯、IFM易福门、Beckhoff倍福、富士、ABB低压 等进口品牌.
EE-SX671A
EE-SX672
G6B-4BND DC24
G6D-F4B DC24
G9SA-301 AC/DC24V
D4V-8107Z-N
GLS-1
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330180-51-05
330180-91-05
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6SE6440-2UD33-7EB1
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P0914TN
6SE6440-2UD37-5FB1----
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FBM215
TRICONEX
1756-IF16H
313-5BG04-0AB0
221-1BH22-0XA8
RM9001
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ACS880-01-169A-3
ACS550-01-180A-4
SMIO-01
ACS550-01-045A-4
ACS550-01-290A-4
6AV2124-0GC01-0AX0
20-HIM-A6
SA 4100
G E 40258
G 1/2 E 43375
1LE1001-1DB43-3JA4-Z
1LE1001-1DB43-4AA4-Z
1LE1001-1DB43-4JA4-Z
C98043-A7006
C98043-A7006-L1
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A185-30-11*220-230V
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NXB-63 2P C50
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CJ1W-AD081-V1
CP1W-CIF01
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CP2E-N60DT-D
CP2E-N40DT-D
CP2E-N30DT-D
CP1H-X40DT-D
NB10W-TW01B
D4NS-1AF
E39-R1
E3Z-D61
E3Z-G61
E3Z-R61
E3Z-T61
E3Z-R81
E6B2-CWZ6C 360P/R 2M
E6B2-CWZ6C 600P/R 2M
E6B2-CWZ6C 1000P/R 2M
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E5CC-RX2ASM-800
E5CC-QX2ASM-800
E5CC-RX2ASM-802
E5CC-QX2ASM-802
EE-1006 2M
EE-SX671
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IM1-22Ex-R 7541231
IM33-22Ex-Hi/24VDC 7506441
IM1-22Ex-T 7541232
山特C1K
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XPSUAF13AP
IL-N10ME1 2M
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NSC100S3100N
FR-E840-0026-4-60
FR-E840-0095-4-60
VADMI-300-P
VADMI-200-P
VADMI-140-P
VADMI-300
VADMI-200
VADMI-140
VADMI-95
ITV1010-012N
ITV2090-312N5
VNB41A-25A-5DB
SY7120-5DZ-02
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