网络1

LD SM0.1
CALL USS_INIT:SBR2, 1, 9600, 2#1, M0.0, VB10

网络2

LD SM0.0
= L60.0
LD 启动:I0.0
= L63.7
LDN SM0.0
= L63.6
LD 停止:I0.1
= L63.5
LD 复位:I0.2
= L63.4
LDN SM0.0
= L63.3
LD L60.0
CALL USS_CTRL:SBR5, L63.7, L63.6, L63.5, L63.4, L63.3, 1, 1, 速度给定:VD100, M0.1, VB11, VW10, 驱动速度反馈:VD104, M0.2, M0.3, M0.4, M0.5

网络3 #I0.3接通，频率写入P1000

LD SM0.0
= L60.0
LD 允许频率给定:I0.3
EU
= L63.7
LDN SM0.0
= L63.6
LD L60.0
CALL USS_WPM_W:SBR10, L63.7, L63.6, 1, 1000, 0, 频率给定:VW20, &VB100, M0.6, VB20

网络4 #每个一段时间读取反馈频率值，保留在VW30中

LD SM0.0
= L60.0
LD T32
EU
= L63.7
LD L60.0
CALL USS_RPM_W:SBR8, L63.7, 1, 1000, 0, &VB200, M0.7, VB30, VW30

网络5

LD I0.4
AN T32
TON T200, 50


这是小弟刚编的用USS协议库控制MM430变频器的编程

有启动，停止 复位，频率写，频率读功能，其他相关功能不需要

不知道我写的对不对，请各位大侠帮小弟看看对不对
（因为PLC跟变频器还没到货，所以无法亲自调试）