From 72721bf221e6f90fb830bf28133c7588e30e1d30 Mon Sep 17 00:00:00 2001
From: zhangqian <zhangqian@123.com>
Date: 星期四, 26 十月 2023 17:41:19 +0800
Subject: [PATCH] fix
---
service/plc.go | 16 +++++++++++++---
1 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/service/plc.go b/service/plc.go
index a0240ab..183cb00 100644
--- a/service/plc.go
+++ b/service/plc.go
@@ -97,7 +97,9 @@
if len(value) == 2 {
val = binary.BigEndian.Uint16(value)
} else if len(value) == 4 {
- val = binary.BigEndian.Uint32(value)
+ low16Val := uint32(binary.BigEndian.Uint16(value[:2]))
+ high16 := uint32(binary.BigEndian.Uint16(value[2:])) << 16
+ val = low16Val + high16
} else {
logx.Errorf("plc read get an unknown int value: %v, address:%v", value, address)
return nil, errors.New(fmt.Sprintf("unknown int value锛�%v", value))
@@ -118,13 +120,21 @@
func ReadHoldingRegister(ipAddr string, address, length int) ([]byte, error) {
if conf.Conf.PLC.Package == constvar.PlcPackageApache {
- return apacheplc4x.ReadHoldingRegister(ipAddr, address, length)
+ newLength := length / 2
+ if newLength == 0 {
+ newLength = 1
+ }
+ return apacheplc4x.ReadHoldingRegister(ipAddr, address, newLength)
} else if conf.Conf.PLC.Package == constvar.PlcPackageApacheLongConnection {
conn, err := plc.GetModbusConnection(ipAddr)
if err != nil {
return nil, err
}
- return plc.ReadHoldingRegister(conn, address, length)
+ newLength := length / 2
+ if newLength == 0 {
+ newLength = 1
+ }
+ return plc.ReadHoldingRegister(conn, address, newLength)
} else {
return modbusx.Read(ipAddr, uint16(address), uint16(length))
}
--
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