diff --git a/apps/chrg/applications/thread/chrg_comm.c b/apps/chrg/applications/thread/chrg_comm.c
index dd2031b..2466bd1 100644
--- a/apps/chrg/applications/thread/chrg_comm.c
+++ b/apps/chrg/applications/thread/chrg_comm.c
@@ -27,7 +27,7 @@
 #include "stm32f4xx_hal.h"
 
 #define HOLD_REG_FIRMWARE_VERSION 0x0300U /* 协议板固件版本，只读 */
-#define CHRG_FIRMWARE_VERSION     0x0145U /* 当前协议板版本：V1.1.53 */
+#define CHRG_FIRMWARE_VERSION     0x0146U /* 当前协议板版本：V1.1.54 */
 
 
 rt_uint8_t ucDiscInBuf[(TOTAL_DISC_REGS+BITS_UCHAR-1)/BITS_UCHAR];
diff --git a/apps/chrg/applications/thread/chrg_north.h b/apps/chrg/applications/thread/chrg_north.h
index 1b1a722..fb2b234 100644
--- a/apps/chrg/applications/thread/chrg_north.h
+++ b/apps/chrg/applications/thread/chrg_north.h
@@ -16,7 +16,7 @@
 #include "chrg_def.h"
 
 /* V_On启停判定电压源：切换后需重新编译固件。 */
-#define SINK_VON_VOLTAGE_FROM_PROTOCOL  1U
+#define SINK_VON_VOLTAGE_FROM_PROTOCOL  6U
 #define SINK_VON_VOLTAGE_FROM_POWER     2U
 #ifndef SINK_VON_VOLTAGE_SOURCE
 #define SINK_VON_VOLTAGE_SOURCE         SINK_VON_VOLTAGE_FROM_POWER
diff --git a/apps/chrg/applications/thread/chrg_roll_sou.c b/apps/chrg/applications/thread/chrg_roll_sou.c
index e0b00a8..afb19a1 100644
--- a/apps/chrg/applications/thread/chrg_roll_sou.c
+++ b/apps/chrg/applications/thread/chrg_roll_sou.c
@@ -963,6 +963,11 @@ void chrg_roll_sou_thread_entry (void *data)
 				continue;
 			}
 			pROLL->idx = (eIDX_SOU_CH)single_ch;
+			#if SOUTH_COMMAND_DEBUG
+			/* 此处已完成物理通道选通，打印通道号比固定的Modbus从机地址更便于排查。 */
+			rt_kprintf("south write: ch=%d reg=0x%04x value=0x%04x\n",
+				single_ch + 1U, single_reg, single_value);
+			#endif
 			chrg_eload_write_reg(ID_ELOAD, single_reg, single_value);
 		}
 		break;
@@ -983,6 +988,11 @@ void chrg_roll_sou_thread_entry (void *data)
 				continue;
 			}
 			pROLL->idx = (eIDX_SOU_CH)command_ch;
+			#if SOUTH_COMMAND_DEBUG
+			/* COM批次按选通后的实际通道打印南向写寄存器指令。 */
+			rt_kprintf("south write: ch=%d reg=0x%04x value=0x%04x\n",
+				command_ch + 1U, command_reg, command_value);
+			#endif
 			chrg_eload_write_reg(ID_ELOAD, command_reg, command_value);
 		}
 		break;
diff --git a/apps/chrg/applications/utils/chrg_def.h b/apps/chrg/applications/utils/chrg_def.h
index f2bb32c..9b6513c 100644
--- a/apps/chrg/applications/utils/chrg_def.h
+++ b/apps/chrg/applications/utils/chrg_def.h
@@ -14,8 +14,8 @@
 /* CHRG application version. Keep this value synchronized with the changelog. */
 #define CHRG_VERSION_MAJOR       1U
 #define CHRG_VERSION_MINOR       1U
-#define CHRG_VERSION_PATCH       53U
-#define CHRG_VERSION_STRING      "V1.1.53"
+#define CHRG_VERSION_PATCH       54U
+#define CHRG_VERSION_STRING      "V1.1.54"
 
 /*
  * Channel polling mode:
diff --git a/apps/chrg/applications/utils/chrg_eload.c b/apps/chrg/applications/utils/chrg_eload.c
index 16bec7e..40c849f 100644
--- a/apps/chrg/applications/utils/chrg_eload.c
+++ b/apps/chrg/applications/utils/chrg_eload.c
@@ -276,10 +276,6 @@ int chrg_eload_read_regs (rt_uint8_t addr, rt_uint16_t reg, rt_uint16_t len)
  	u16_to_u8v(value, &buf[4]);
  	crc = mb_crc16(buf, 6);
  	u16_to_u8v(swap_u16(crc), &buf[6]);
-#if SOUTH_COMMAND_DEBUG
-	rt_kprintf("south write: addr=%d reg=0x%04x value=0x%04x\n",
-		addr, reg, value);
-#endif
 	return chrg_south_send(buf, 8);
 }
 
diff --git a/apps/chrg/applications/utils/chrg_sink.h b/apps/chrg/applications/utils/chrg_sink.h
index b9083e6..9c3d409 100644
--- a/apps/chrg/applications/utils/chrg_sink.h
+++ b/apps/chrg/applications/utils/chrg_sink.h
@@ -21,7 +21,7 @@ struct chrg_switch_t;
 #define SINK_TEST_OCP   2
 #define SINK_TEST_DYNA  3
 /* 短路测试期间按该周期补发WORK_START，防止功率板因超时停止。 */
-#define SINK_SHORT_START_INTERVAL_MS  50U
+#define SINK_SHORT_START_INTERVAL_MS  100U
 /* 短路测试不受普通V_ON门槛限制，功率板使用最低启动电压。 */
 #define SINK_SHORT_TEST_VON_MV        500U
 //短路测试结构体
diff --git a/docs/修改日志.md b/docs/修改日志.md
index a90783e..04b218d 100644
--- a/docs/修改日志.md
+++ b/docs/修改日志.md
@@ -1,5 +1,12 @@
 # 修改日志
 
+## V1.1.54 - 2026-10-05
+
+### 南向写寄存器打印通道号
+
+- 南向写寄存器日志改为打印实际选通通道号，不再打印固定的Modbus从机地址。
+- 协议板版本寄存器 `0x0300` 更新为 `0x0146`。
+
 ## V1.1.53 - 2026-09-30
 
 ### 负载协议切换后CC恢复