ethercat从站缺少邮箱通信导致配置失败

ethercat： igh主站在配置没有邮箱通信的从站时配置失败，这种情况该怎么解决？

从站扫描结果：
/* Master 0, Slave 0, "Smartind 64 DO Module (NPN Output Type)"
 * Vendor ID:       0x00999999
 * Product code:    0x00010005
 * Revision number: 0x20200824
 */

ec_pdo_entry_info_t slave_0_pdo_entries[] = {
    {0x7000, 0x01, 8}, /* Output Channel 1 */
    {0x7000, 0x02, 8}, /* Output Channel 2 */
    {0x7000, 0x03, 8}, /* Output Channel 3 */
    {0x7000, 0x04, 8}, /* Output Channel 4 */
    {0x7000, 0x05, 8}, /* Output Channel 5 */
    {0x7000, 0x06, 8}, /* Output Channel 6 */
    {0x7000, 0x07, 8}, /* Output Channel 7 */
    {0x7000, 0x08, 8}, /* Output Channel 8 */
    {0x6000, 0x01, 8}, /* Setting 1 */
    {0x6000, 0x02, 8}, /* Setting 2 */
};

ec_pdo_info_t slave_0_pdos[] = {
    {0x1600, 8, slave_0_pdo_entries + 0}, /* DO Channel */
    {0x1a00, 2, slave_0_pdo_entries + 8}, /* Reserved */
};

ec_sync_info_t slave_0_syncs[] = {
    {0, EC_DIR_OUTPUT, 1, slave_0_pdos + 0, EC_WD_ENABLE},
    {1, EC_DIR_INPUT, 1, slave_0_pdos + 1, EC_WD_DISABLE},
    {0xff}
};

配置操作：
 case 0x00010005://DG_Smartind
          {
            int ret = ecrt_slave_config_pdos(sc[i], EC_END, slave_Smartind_syncs); //注册pdo
            if (!ret) {
                printf("config DG_Smartind pdos %d sucessed\n", i);
            } else continue;
            ec_pdo_entry_reg_t domain1_DG_Smartind[] = {
                {0, i, DG_Smartind, 0x7000, 0x01, &offset_Smartind[i][0], NULL},//out1-8
                {0, i, DG_Smartind, 0x7000, 0x02, &offset_Smartind[i][1], NULL},//out9-16
                {0, i, DG_Smartind, 0x7000, 0x03, &offset_Smartind[i][2], NULL},//out1
                {0, i, DG_Smartind, 0x7000, 0x04, &offset_Smartind[i][3], NULL},//out1
                {0, i, DG_Smartind, 0x7000, 0x05, &offset_Smartind[i][4], NULL},//out1
                {0, i, DG_Smartind, 0x7000, 0x06, &offset_Smartind[i][5], NULL},//out1
                {0, i, DG_Smartind, 0x7000, 0x07, &offset_Smartind[i][6], NULL},//out1
                {0, i, DG_Smartind, 0x7000, 0x08, &offset_Smartind[i][7], NULL},//out57-64
                {0, i, DG_Smartind, 0x6000, 0x01, &offset_Smartind[i][8], NULL},//setting1
                {0, i, DG_Smartind, 0x6000, 0x02, &offset_Smartind[i][9], NULL},//setting2
            };
            ret = ecrt_domain_reg_pdo_entry_list(domain1, domain1_DG_Smartind);//注册pdo entry
            printf("ret: %d\n", ret);//ret = -2
            if (!ret) {
                printf("DG_Smartind %d : %#x\n", i, offset_Smartind[i][0]);
            } else continue;
            ecrt_slave_config_dc(sc[i], 0x0300, 1000000, 300000, 0, 0); //temp
        }break;

出现的结果：
Slave 0 :  config DG_Smartind pdos 0 sucessed
Failed to register PDO entry: No such file or directory
ret: -2

从站的现象：
从站io输出异常，不受控

检查从站的配置是否正确，检查从站的网络连接是否正常看看吧
望采纳